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The greenish tint seen on the edges of tempered glass is caused by?

Manganese

Iron

Silicate

Copper

The green tint found in most tempered glass is a result of iron used in the production of glass sheets, where it is added as an ingredient to act as a lubricant. In fact, except in manufacturing processes designed to minimize iron use to avoid the green tint, you’ll find that green cast in all sheets of glass–not just tempered glass

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4

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This photo has been taken at a seaglass beach in Hawai'i. How is the sea glass formed?

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A characteristic feature of hyalite glass is?

black or red color and lack of transparency

high fire resistance

black color and poor cold resistance

inability to store liquids, especially alcohols

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