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Although helenite and obsidian are both forms of glass, helenite differs from obsidian in that it is man-made. The stone has been marketed by the jewelry industry because of its emerald-like color, good refractive index, although its durability is low. It has a hardness of just 5 to 5 ½ and chips about as easily as obsidian or window glass.
Nine of those factories made flint glass (crystal). The remaining factories made products such as bottles and window glass. [62] [Note 4] The best known Pittsburgh glass company was Bakewell, Pears and Company. The company was known for its crystal, including cut and engraved glassware. It also made window glass, bottles, and lamps. [64]
Two large stained-glass windows installed by Hartford City Glass Company's Belgian glass workers A New England Glass Company ewer , 1840–1860 A Novelty Glass Company advertisement in 1891 An electrical insulator made by Whitall Tatum Company , circa 1922
Price on eBay: $400 MacBeth-Evans Petalware had a graceful, flower-like design that came in a variety of colors. Produced between 1930 and 1940, this Depression glass pattern features delicate ...
In 1905, the Hocking Glass Company was founded by Isaac Jacob (Ike) Collins in Lancaster, Ohio, and named after the Hocking River. [2] In 1937, that company merged with the Anchor Cap and Closure Corporation , thus becoming Anchor Hocking Glass Corporation.
The glass typically used for these products is now called peachblow glass (not peachbloom), although the original product names differed. [78] Among the rivals to Hobbs, Brockunier, and Company that made peachblow glass were New England Glass Company (Wild Rose), Thomas Webb and Sons (Peach Glass), and Stevens and Williams (Peach Bloom). [79]
In the glass–making industry, the melted batch is called "metal". [3] The metal is typically shaped into the glass product (other than window glass) by glassblowing or pressing it into a mold. [4] The glass product must then be cooled gradually , or it will break. [5] An oven used for annealing is called a lehr. [6]
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