Slag is a byproduct of steel production and is similar in character to volcanic rocks such as basalt and granite. Carnival Glass Identification and Value Guide, Fenton Art Glass Identification and Value Guide, How to Collect Antique American Brilliant Period Cut Glass, Types of Colorful Glass Used in Vintage Kitchenware, Overview of the Quezal Art Glass and Decorating Company. Lot 739: Atterbury & Co. Slag Glass Kerosene Lamp Base, Jeffrey S. Evans & Associates, Mt. Based only on the images, there are other possibilities, however. Condition is a big factor, as is age – newer vintage pieces tend to sell for less than earlier antique examples. Lot 1330: A Tiffany Studios Favrile Glass and Gilt Bronze Dragonfly Table Lamp, Hindman, Chicago, IL (October 9, 2012). We are a cullet factory for all kinds of recycled glass products. Slag, as I’ve learned, is sort of a catch-all word for the waste product produced particularly in metal working and glass making. 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. Rock Mulch & More delivers aggregate supplies like 57 limestone gravel, concrete sand, and much more in the Pittsburgh region. They are comparable to … 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. The size is about that of a quarter (1 & ¼” X ¼”) and is grayish black. Perhaps the most unique addition to the slag glass market during this period was Ohio-based maker. That doesn't mean it isn't valued by collectors, however. 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… View our, What is Slag Glass? Please call for availability (843-559-5829) due to the shortage at this time. 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. 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. When melted together, these colors took on a marbling similar to that seen in iron slag. (The term “slag” comes from the undocumented belief that slag from iron smelting works was added to the glass to give it color.) 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. Coffee after. 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. Pioneer Sand decorative landscape glass is made from 100% recycled material. Lamps with hand-slumped glass shades from Renfort Lamps . Pamela is an antique expert and the author of three books on the subject. Slag Rock #57 (Commercial 57’s) is an aggregate used for Unconfined Fill, Base or Embankment. Later, familiar companies like Westmoreland, Imperial Glass, and Akro Agate made slag glass in a variety of colors. Newer glass by Fenton, Boyd, and Mosser may also be marked. FAST 'N FREE. It will always be an opaque color with lots of white or creamy colored swirling. But how does it get that color, you may ask? The final question to contemplate, though, is the value of these pieces. As for slumped, it’s glass that’s been fired in a kiln to make it curve. So celebrated are their designs that they rank among the collections of the world’s most prestigious museums, like this. Slag is a byproduct from steel production that would otherwise wind up in landfills. These coveted decorative accessories are not as common as other decorative objects made of slag glass, however. or Best Offer. The overflow glass was essentially garbage. Browse slag glass for sale at auction today on Invaluable. Lot 299: Tiffany Studios Bronze Slag Glass Jewelry Box, Hill Auction Gallery, Sunrise, FL (29 November 2017) Est: $1,000-$3,000. Other types of metal ores produce different colors of … Slag Cullet Glass Rock Clear Cranberry Red 5 0 Lb Ee31 Rocks Yard Deco Aquarium For. Many of the same designs for milk glass were also produced in slag glass. Whether you're working on a garden project, building a driveway, or even preparing a swimming pool, we have the supplies you need. 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. This predominance can make identifying true slag glass challenging, a point reinforced by the fact that there are so many associated colors. 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. Colors of slag glass can be acquired at a wide range of specifications, and largely in construction... At this time variations in color with swirls of white or cream within the glass during production Handel, Hubbard! Blue is ROYAL BLUE, lightest is TEAL BLUE different types of decorative objects made of glass! 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