Lot 391: A Tiffany Studios ‘Drop-Head Dragonfly’ table lamp circa 1910, Andrew Jones Auctions, Los Angeles, CA (15 September 2018) Sold: $160,000, Lot 30: Tiffany Studios Pine Needle Picture Frame,  Toomey & Co. Auctioneers, Oak Park, IL (2 December 2018) Est: $2,000-$4,000. Favorite Add to Light Turquoise, Lot 2 Pc, 5#, Aquarium Rock, Slag Glass Rock, Slag Glass Cullet, Sorcerer Stone, Slag Glass, Turquoise Glass… Perfect for a quiet space where reading and re… This tradition carried over into the twentieth century, with prominent makers including, , Boyd, and Westmoreland, who experimented with an array of delightful slag glass novelties. It is slag-like, opaque material found as vesicular free forms or sheet-like/ropy masses. Glass rocks are an eco-friendly and long-lasting product that will continue to look great, year after year. The Sowerby firm in England filed one of the first patents for slag glass during the later years of the 1870s for their striking purple malachite glass. housed at New York’s Metropolitan Museum of Art. Not all manufacturers marked their wares, but a number did like Sowerby in England. Tiffany Studios also made objects such as picture frames, desk sets, and decorative boxes made with slag glass. Update your email preferences at any time. Now these used to be everywhere, because in Arkansas, there was glass factory called Fenton. For example, Westmoreland conjured this, ” covered dishes, while Boyd developed a specialty for the novelty figurine, like this, . Also keep in mind that early slag glass will be purple, blue, green, or dark brown. 4.7 out of 5 stars 510. sell for mere dollars. 2000). Adding to the beauty of slag glass – also known as malachite glass, marble glass, and mosaic glass – is its rich history that reflects the ingenuity of turn-of-the-century glassmakers. Vintage rough slag glass rock pieces multicolored bundle clear & green 1” chunks Have Fun! Natural pozzolanas are abundant in certain locations and are extensively used as an addition to Portland cement in countries such as Italy, Germany, Greece and China. See it at Harms Antique Way in downtown Wisner, Nebraska. These pieces, which ranged from spectacular lamps to smaller decorative pieces, like jewelry boxes and picture frames, showcased the artful way in which these makers could use the subtle variations of slag glass to great effect. Perhaps the most unique addition to the slag glass market during this period was Ohio-based maker Akro Agate, who had originally earned acclaim for making marbles. The benefit of this incredible price range is that the slag glass market is accessible for virtually any budget and can satisfy those seeking bold statement pieces as well as smaller accent decorations. So, whether you are ready to make a big investment or simply want to spend a few dollars, memorable examples of slag glass can be yours. Pamela is an antique expert and the author of three books on the subject. Crafting set of 8 TEALIQUE. Steel slag can also be produced by smelting iron ore in a basic oxygen furnace. There was also Challinor, Taylor & Company, who excelled in smaller slag glass home goods, like these, , from the closing years of the nineteenth century. Fulgurite can be helpful in instances of low or constricted physical energy. The final question to contemplate, though, is the value of these pieces. These items are brown in color with swirls of white or cream within the glass. Slag glass, a type of opaque, streaked, antique pressed glass that originated in England in the late 19th century, was used in glassware items such as lampshades, jugs, wine glasses and beakers. For more affordable vintage collectibles made of slag glass, Akro Agate is a viable option. Depending on which company made them, slag glass pieces were referenced as "marble glass," and "malachite glass," along with a number of other names back when they were newly marketed (The Glass Encyclopedia). Slag glass gets its name from slag, or the byproduct of steel production. The benefit of this incredible price range is that the slag glass market is accessible for virtually any budget and can satisfy those seeking bold statement pieces as well as smaller accent decorations. Blue Slag Glass Necklace - Petoskey Stone Necklace - Michigan Stone Jewelry - Fossil Necklace - Nature Lover Gift - River Rock - Beach Stone GiannasJewelryBox. Perhaps the most celebrated examples of twentieth-century American slag glass are those of the, With this extensive popularity of slag glass among these producers, collectors can find numerous examples of antique and vintage, Condition is a big factor, as is age – newer vintage pieces tend to sell for less than earlier antique examples. Looking at the color, and how much white marbling a piece has, is one indicator of age. This Sellers Kitchen Cabinet sports slag glass and has chippy paint. Lot 167: Roycroft/Dard Hunter Extremely Rare Table Lamp, Rago Arts and Auction Center, Lambertville, NJ (17 September 2005) Est: $40,000-$50,000. These almost always sell in the thousands, but to fans of Tiffany's work rather than to glass collectors. Sowerby’s slag glasswares, along with the similar pressed glass designs of contemporaneous English makers Davidson and Greener & Company, are still some of the most coveted today, particularly those that feature their unique brown malachite glass. Recognizing slag glass is easy due to the distinctive coloration. It is located throughout a semi-continuous swath in baked pod-like clay-bearing sediment in an area of about 55 kilometres long by 10 kilometres along the western side of the Flinders Ranges near Parachilna and east of Lake Torrens. Not all Fenton slag glass will be worth quite as much, so each piece in a collection should be evaluated based on the style and color. Genuine sea glass" can be collected as a hobby and is used for decoration, most commonly in jewelry. Price Guide and History, Early creators of slag glass were rumored to incorporate pulverized fragments of iron slag chunks into their molten glass, before pressing it to accomplish the rich variety of colors seen in these glass pieces. Whether you use them as part of a water feature or in a gabion retaining wall, the glass … When melted together, these colors took on a marbling similar to that seen in iron slag. It can help in healing blockages and strengthening blood flow in the extremities and capillaries. What Slag (or Cullet) is, is the end pieces from a glass factory. The. Blue Slag Glass Jewelry | Natural Blue Sea Glass Pendant | Turquoise Gemstone from Lake Michigan | Leland Blue Stone Jewelry Bead Seaglass Allybeans. These included, , from 1860 to around 1900. But when the term "midcentury glass" comes up, it references art glass pieces made by many different companies during this period. However, slags can contain metal sulfides and elemental metals. Get the latest stories, price guides and exclusive content delivered straight to your inbox. Look for small vases, bowls, children's dishes, and smoking accessories in a variety of colors for less than $25 per piece.Â. These included Atterbury & Company, who was one of the United States’ earliest producers of slag glass. These antique slag glass lamps look like they would fit best in an opulent manner home, and now, you can get them for your home. When iron ore is smelted in that process, the remaining residue is a glass-like, often glossy material that takes on different colors depending on the minerals and elements present in the iron. The Corning Museum of Glass also notes a secondary process, in which the “slag” of slag glass was developed from lingering scraps of glass leftover in the pots of glassmaking factories at the end of each work day. Give your home a classic, old-time showpiece, and display these lamps somewhere they will be seen often. One of the most common colors of slag glass is purple, but these Victorian-era wares were also made in blue and green along with brown.Â. Newer slag glass has been made in the United States by Fenton, Boyd Glass, Summit, and Mosser during the past few decades, and the color palette has expanded over time. This article strolls through this history and highlights some of its most popular forms for those who want to surround themselves with exceptional slag glass pieces. 5 out of 5 stars (98) $ 11.99. With this extensive popularity of slag glass among these producers, collectors can find numerous examples of antique and vintage slag glass pieces on the market today. Perhaps the most celebrated examples of twentieth-century American slag glass are those of the Art Nouveau and Art & Crafts era, such as Tiffany Studios, Steuben, and Roycroft, all of whom sensed that the natural variation in the marble textures would complement the organic sensibilities of their designs. Lot 739: Atterbury & Co. Slag Glass Kerosene Lamp Base, Jeffrey S. Evans & Associates, Mt. Item Natural Clear Color Green Slag Glass Rock for Garden Landscaping and Gabion Color Clear Green, Size 3 - 60 cm Piling Density 2.5 tons / cubic meter Packing 1 metric ton per crate, or Gabion box MOQ 1 metric ton per color, in total 1x 20' container is perfered. One clear indicator, though, of true slag glass is the richness of its tonal variations: real slag glass will not simply bear streaks of color but instead will offer more subtle variations in opacity and tone like one would expect from marble or alabaster. Moving into the early 1900s, manufacturers used other methods to make pieces that fall into the slag glass category. This was probably the most prolific manufacturer of slag glass in the United States. (If a mineral indeed scratches glass, you will be unable to wipe the scratch away.). Only 1 available and it's in 1 person's cart. Browse slag glass for sale at auction today on Invaluable. Akro Agate is an American company that marked most of their wares ranging from children's dishes to small decorative flower pots. , to expand their reach (although, they preferred to call their pieces “multi-colors” rather than “slag glass”). I included a picture from someone who had refinished their cabinet. Regardless of which technique was used by various makers, slag glass reflected a brilliant repurposing of materials otherwise resigned to the refuse bin, resulting in some of the most dynamic and eclectic colors known within the glassmaking industry. It will always be an opaque color with lots of white or creamy colored swirling. Though it is known by several names, slag glass is a variety of pressed glass that is universally celebrated by collectors for its characteristically subtle variations in color and opacity. According to the Slag Cement Association, substituting 50% slag cement for portland cement reduces greenhouse gas emissions by more than 40% and lowers the embodied energy of concrete by more than 30%. Okay, did some more research and found out it is Slag Glass a by product from the 19th century iron forging in the... Found in Wawayanda State Park, New Jersey. 4.3 out of 5 stars 18 ratings. Slag is the glass-like by-product left over after a desired metal has been separated (i.e., smelted) from its raw ore. Slag is usually a mixture of metal oxides and silicon dioxide. The doors and drawers all work great. Be suspicious of highly transparent forms, unless the mine is identified and known.Natural transparent Obsidian usually occurs as small … When iron ore is smelted in that process, the remaining residue is a glass-like, often glossy material that takes on different colors depending on the minerals and elements present in the iron. Pink slag glass made by Northwood/Dugan in the early 1900s is quite valuable—a pitcher with matching water tumblers in this uncommon color will likely fetch $1,000 at auction. The visual marbling of this slag is reminiscent of slag glass, however, the presence of actual slag in slag glass pieces depends on how it was created. Carnival Glass Identification and Value Guide, How to Collect Antique American Brilliant Period Cut Glass, Types of Colorful Glass Used in Vintage Kitchenware, Fenton Art Glass Identification and Value Guide, Overview of the Quezal Art Glass and Decorating Company. $24.99 $ 24. Slag cement requires nearly 90% less energy to produce than portland cement. These include items ranging from small figurines to larger bowls made of red glass several decades ago, so they are collectible but not yet antique. also notes a secondary process, in which the “slag” of slag glass was developed from lingering scraps of glass leftover in the pots of glassmaking factories at the end of each work day. This mineral is about 4.0 on the Mohs scale. However, such items sold as Obsidian nearly always turn out to be manmade glass or some other mineral entirely. From shop Crystalmermaidgifts. Perhaps the most unique addition to the slag glass market during this period was Ohio-based maker. The next step in determining old from new is looking for a maker's mark on the bottom of a piece. Older pieces will be heavily marbled and quite chunky. Edeowie glass is a natural glass, or lechatelierite, found in the Australian state of South Australia. That doesn't mean it isn't valued by collectors, however.Â. They created beautiful pieces like this striking kerosene slag glass lamp base, from 1860 to around 1900. Get it as soon as Wed, Feb 10. Email. 99. With these maker names in mind and these tips to guide your research, you should be well on your way to a successful search for a splendid new slag glass piece to your collection. Crawford, VA (March 2019), Lot 943: Tiffany Studios; Rookwood; Tiffany Arrowroot shade, Rago Arts and Auction Center, Lambertville, NJ (27 October 2012) Est: $35,000-$45,000. So celebrated are their designs that they rank among the collections of the world’s most prestigious museums, like this goblet housed at New York’s Metropolitan Museum of Art. Cobalt glass is any glass that has been combined with small amounts of copper and cobalt to produce a blue appearance. Find Antique Slag Glass Lamps. Glass items include vases, plates, stemware, platters, jars and dishes of assorted sizes and shapes. In fact, some pieces marked as Sowerby slag glass made in England look very much like pieces that were made in the United States during the early years.Â. It is perhaps thanks to this novelty that the introduction of slag glass in the later years of the nineteenth century resulted in excitement from glassmakers and glass collectors alike. Lot 690: Purple Slag Articles, Lot of Two, Green Valley, Mt. There are 3 different colors to choose from darkest is identified as BLUE, medium Blue is … Volcanic ashes and pumices largely composed of volcanic glass are commonly used, as are deposits in which the volcanic glass has been altered to zeolites by interaction with alkaline waters. Slag glass gets its name from slag, or the byproduct of steel production. Another factor is slag cement’s nearly white color. ‘Mineral fiber insulation, including fiber glass and rock wool, is produced from either molten glass, slag, or rock.’ ‘There were areas of bare rock and slag, which were around old gold mines, according to the naturalist.’ ‘The stats and history of this limestone slag heap are impressive in their own right.’ 3-5. Some of Fenton's slag glass pieces can also be quite valuable, selling in the hundreds. The region in which this glass … These weathering processes produce natural frosted glass. " Meanwhile, imitation slag glass, like this early twentieth-century ashtray, reveals an unusually uniform color. Our glass rocks are made from totally recycled glass, so there’s no damage to the environment. She's written over 400 articles on antique collecting for The Spruce Crafts. These coveted decorative accessories are not as common as other decorative objects made of slag glass, however. Get DIY project ideas and easy-to-follow crafts to help you spruce up your space. It … These easily sell for thousands when in excellent condition, with Tiffany being the top of the line, of course. Crawford, VA (26 September 2008). It is oak so if you decide to strip it the natural wood would be beautiful. Of course, brown was not the extent of their color palette: Sowerby especially experimented with a wide array of colors, including their vibrant giallo (yellow), sorbini (bright blue), and pomona (a muted green) shades. Later, familiar companies like Westmoreland, Imperial Glass, and Akro Agate made slag glass in a variety of colors. Mar 25, 2018 - Explore Raette Kaiserlian's board "Slag" on Pinterest. Use slag glass in a multitude of ways-art projects-mosaics-stained glass-jewelry-home decor-in the garden And so much more! Early creators of slag glass were rumored to incorporate pulverized fragments of iron slag chunks into their molten glass, before pressing it to accomplish the rich variety of colors seen in these glass pieces. Slag Glass Boulder ~ Blue ~ Crystal Brand: Kristmas in July. Slag glass was often used in lampshade production as well as for crafting many different types of decorative objects.Â, American company Washington Beck made molds for slag glass factories in the United States and England in the mid- to late-1800s. When melted together, these colors took on a marbling similar to that seen in iron slag. The difference is that rather than using true slag gleaned from ore, two colors of molten glass were combined–an opaque color and white–to give the molded pieces their swirled appearance. See more ideas about glass, slag, glass rocks. So, whether you are ready to make a big investment or simply want to spend a few dollars, memorable examples of slag glass can be yours. Regardless of which technique was used by various makers, slag glass reflected a brilliant repurposing of materials otherwise resigned to the refuse bin, resulting in some of the most dynamic and eclectic colors known within the glassmaking industry. The first pressed glass pieces that collectors refer to as "slag glass" were made in the 1890s, using the glass-like by-product of iron ore known as—you guessed it—slag. Newer glass by Fenton, Boyd, and Mosser may also be marked. … "Sea glass" is physically and chemically weathered glass found on beaches along bodies of salt water. Other types of metal ores produce different colors of slag when they are refined. View our, What is Slag Glass? Additionally, how hard does a mineral have to be to scratch glass? Figuring out who made a piece, and how old it is, can be a bit more tricky. There are a few ways to learn about vintage glass and how to identify it. However, perhaps the biggest indicator of price is the maker of the work: signed, , can sell in the tens of thousands, while the diminutive and delicate collectibles like this. ASTM C 989 (AASHTO M 302) classifies slag by its increasing level of reactivity as Grade 80, 100, or 120 (Table 3-1). Proceeding with the glass plate, the mineral is unable to scratch the glass (hardness = 5.5) at all. Although cobalt glass is available anywhere that … 5 out of 5 stars (110) $ 34.99. Condition is a big factor, as is age – newer vintage pieces tend to sell for less than earlier antique examples. There was also Challinor, Taylor & Company, who excelled in smaller slag glass home goods, like these multi-color salt and pepper shakers, from the closing years of the nineteenth century. With excess phosphate in water being a significant issue in the Chicago-Gary area, this benefit from slag could be another use for the material and could decrease the need to mine new natural materials for water treatment applications. According to methods for cooling molten steel slag, steel slag is classified into five types: natural air-cooling steel slag, water-spray steel slag, water-quenching steel slag, air-quenching steel slag, and shallow box chilling steel slag … 5 out of 5 stars (2,119) 2,119 reviews. Some of the most costly slag glass pieces take the form of lampshades by well-known makers like Handel, Bradley Hubbard, and Tiffany. Thereof, how does the Mohs hardness scale work? Like so many fields of collecting, slag glass can be acquired at a wide variety of price points. Challinor, Taylor, and Co. also made their own version of this type of glass around the same time. While slags are generally used to remove waste in metal smelting, they can also serve other purposes, such as assisting in the temperature controlof the smelting, and minimizing any re-oxidation of the final liquid metal product before the molten metal is removed from the furnace a… It is a natural glass created by lightning strikes in sand and sometimes on rock. From shop Allybeans. These examples of midcentury design are defined by their sculptural, organic shapes the way they refract natural light whether they were made for home use every day or purely decorative purposes. Nov 21, 2019 - Explore Rhonda Gail Spicer's board "SLAG GLASS", followed by 133 people on Pinterest. For example, Westmoreland conjured this Three Kittens Plate or these multicolored and iridescent “Hen on the Nest” covered dishes, while Boyd developed a specialty for the novelty figurine, like this airplane. Because vintage glass is a wide category that includes many different glass types, patterns and colors, it can be difficult to correctly identify vintage glass. However, perhaps the biggest indicator of price is the maker of the work: signed Tiffany Lamps, like this spectacular Dragonfly Lamp, can sell in the tens of thousands, while the diminutive and delicate collectibles like this Boyd train set sell for mere dollars. These items are brown in color with swirls of white or cream within the glass. This glass is a by-product of mining gold from back in the old days ( likely 100+ years ago) I personally found this slag glass outside lake las vegas, in Nevada. They transitioned in the 1930s into pressed slag glass designs, like these paired vases, to expand their reach (although, they preferred to call their pieces “multi-colors” rather than “slag glass”). Foam glass is a porous glass foam material.Its advantages as a building material include its light weight, high strength, and thermal and acoustic insulating properties. Lot 299: Tiffany Studios Bronze Slag Glass Jewelry Box, Hill Auction Gallery, Sunrise, FL (29 November 2017) Est: $1,000-$3,000. If you see a swirled piece in another color, like red or orange, it was made many decades after the first Victorian pieces of true slag glass. Tony Alter / Flickr / CC BY 2.0. ASTM C 1073 covers a rapid determination of hydraulic activity of 59 Chapter 3 Fly Ash, Slag, Silica Fume, and Natural Pozzolans Fig. Lot 255: Arts & Crafts Chandelier, Sconces, Steuben Shades, Wickliff & Associates Auctioneers, Inc., Carmel, IN (17 February 2018) Est: $1,000-$2,000. With the export of these beautiful creations to the United States market, nineteenth-century American producers also entered into slag glass production. Sea glass and beach glass are similar but come from different types of waters. Looking for more? Grisun Copper Fire Pit Glass, 1/2 Inch Round Glass Rocks for Natural or Propane Fireplace, Fire Pit Round Glass Safe for Outdoors and Indoors Firepit Glass, 10 Pounds Fire Glass Beads. Lot 366: Twelve items of purple malachite slag glass (Sowerby’s, Davidson’s, and Greener & Co.) Anderson-Garland, Newcastle Upon Tyne, UK (4 December 2014). Some slag concretes have a slag component of 70% or more of the cementitious material. This predominance can make identifying true slag glass challenging, a point reinforced by the fact that there are so many associated colors. It is perhaps thanks to this novelty that the introduction of slag glass in the later years of the nineteenth century resulted in excitement from, With the export of these beautiful creations to the United States market, nineteenth-century American producers also entered into slag glass production. So celebrated are their designs that they rank among the collections of the world’s most prestigious museums, like this. How to Identify Antique and Vintage Glassware Styles, 24 Good Luck Charms from Around the World, Baseball Card Values and How to Determine Their Worth, The Fifteen Most Expensive Books & Manuscripts Ever Sold, The American Regionalism Movement: Shaping the Art of the Nation, A Guide to Identifying and Collecting Antique Mirrors, 16 of the Most Famous Oil Paintings You Should Know. This tradition carried over into the twentieth century, with prominent makers including Imperial, Boyd, and Westmoreland, who experimented with an array of delightful slag glass novelties. Lot 1330: A Tiffany Studios Favrile Glass and Gilt Bronze Dragonfly Table Lamp, Hindman, Chicago, IL (October 9, 2012). Cobalt glass has been discovered in ancient Babylonian sites, but it was not produced commercially until the late 1800s. The same properties that help ferrous slag neutralize acids (its high calcium content), may help slag absorb the excess phosphate from the water. See more ideas about leland blue, slag, leland blue stone. The first pressed glass pieces that collectors refer to as "slag glass" were made in the 1890s, using the glass-like by-product of iron ore known as—you guessed it—slag. Price: $19.99 + $5.00 shipping: These are absolutely stunning boulders and crystals of slag glass. "Harry Northwood and Thomas Dugan made what was called 'mosaic glass' when they took over the former Hobbs Bruckenier glassworks in Wheeling, West Virginia around 1902," according to The Glass Encyclopedia. Beautiful Rare Blue Slag Glass Natural from Nevada half pound energy of healing waters in stone form Crystalmermaidgifts.