$18.00. For more affordable vintage collectibles made of slag glass, Akro Agate is a viable option. Slag glass gets its name from slag, or the byproduct of steel production. Someone at one of these places should be able to ball you positively identify what you have. There was also Challinor, Taylor & Company, who excelled in smaller slag glass home goods, like these, , from the closing years of the nineteenth century. Coleman's Rocks-R-Gems, 1400 East Grand Avenue, Hot Springs AR 501-624-7280 Edited: 5 years ago , to expand their reach (although, they preferred to call their pieces “multi-colors” rather than “slag glass”). Lot 690: Purple Slag Articles, Lot of Two, Green Valley, Mt. The colors were produced by adding slag, an iron additive, to the glass during production. When you search “glass rocks” on Google, you can only find all kinds of glass rocks factories or suppliers. Mineral wool is any fibrous material formed by spinning or drawing molten mineral or rock materials such as slag and ceramics.. or Best Offer. Recognizing slag glass is easy due to the distinctive coloration. 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. Slag, as I’ve learned, is sort of a catch-all word for the waste product produced particularly in metal working and glass making. These are absolutely stunning boulders and crystals of slag glass. About Us. 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. Slag glass, also commonly known as Malachite glass, is pressed glass made in the same way as Milk glass, but with coloured streaks to create a marble effect. This predominance can make identifying true slag glass challenging, a point reinforced by the fact that there are so many associated colors. Secondly, metals start to oxidize as they are smelted, and slag forms a protective crust of oxides on the top of the metal being smelted, protecting the liquid metal underneath. Also keep in mind that early slag glass will be purple, blue, green, or dark brown. 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. Get DIY project ideas and easy-to-follow crafts to help you spruce up your space. Black rocks can be easily found in various places, including mountains and coastlines. 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. Moving into the early 1900s, manufacturers used other methods to make pieces that fall into the slag glass category. Lot 167: Roycroft/Dard Hunter Extremely Rare Table Lamp, Rago Arts and Auction Center, Lambertville, NJ (17 September 2005) Est: $40,000-$50,000. 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. 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. Meanwhile, imitation slag glass, like this early twentieth-century ashtray, reveals an unusually uniform color. They created beautiful pieces like this striking kerosene slag glass lamp base, from 1860 to around 1900. 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. Slag Cullet Glass Rock Clear Cranberry Red 5 0 Lb Ee31 Rocks Yard Deco Aquarium For. Lot 255: Arts & Crafts Chandelier, Sconces, Steuben Shades, Wickliff & Associates Auctioneers, Inc., Carmel, IN (17 February 2018) Est: $1,000-$2,000. With result is decorative landscape glass is the consistent it its beauty, vividness, and size. Some of Fenton's slag glass pieces can also be quite valuable, selling in the hundreds. When melted together, these colors took on a marbling similar to that seen in iron slag. 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. Slag is primarily used in the cement and construction industries, and largely in road construction. View our, What is Slag Glass? Lot 299: Tiffany Studios Bronze Slag Glass Jewelry Box, Hill Auction Gallery, Sunrise, FL (29 November 2017) Est: $1,000-$3,000. With the export of these beautiful creations to the United States market, nineteenth-century American producers also entered into slag glass production. sell for mere dollars. 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. However, it was salvaged, chiseled, polished and transformed into a beautiful, one-of-a-kind piece of art. 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. These items are brown in color with swirls of white or cream within the glass. 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. Now these used to be everywhere, … The size is about that of a quarter (1 & ¼” X ¼”) and is grayish black. 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. 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. That doesn't mean it isn't valued by collectors, however. For example, Westmoreland conjured this, ” covered dishes, while Boyd developed a specialty for the novelty figurine, like this, . It is produced in large quantities during steel-making operations that use electric arc furnaces. Your glass windows and doors don’t carry that aqua hue! Could be slag glass. from Gabion Fence filled with a mixture of rock and recycled glass, which will be lighte at night for drivers passing The Do Seum. If you are looking for mulch or landscaping decoration consider landscape glass. Pamela is an antique expert and the author of three books on the subject. 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. 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. 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. Glass rocks are an eco-friendly and long-lasting product that will continue to look great, year after year. 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. 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. Within the glass but to fans of Tiffany 's work rather than to glass collectors Clear Cranberry 5! Into a beautiful, one-of-a-kind piece of art Jeffrey S. Evans & Associates, Mt the,... 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