general/gemstones

Aluminosilicate mineral

Green natural glass possibly formed by a meteorite impact

Cyclosilicate mineral

Cyclosilicate mineral

Aluminosilicate mineral

Nodule-like rock, that is formed within rhyolitic volcanic ash layers

Green gem-quality mineral

Green natural glass possibly formed by a meteorite impact

Zinc-iron sulfide mineral

Type of glass

Rare gemstone

Zinc-iron sulfide mineral

Type of glass

Rare gemstone

Sodium-rich plagioclase feldspar mineral

Yellowish or greenish green mineral

Green natural glass possibly formed by a meteorite impact

Aluminosilicate mineral

Single chain manganese inosilicate (MnSiO₃)

Zinc-iron sulfide mineral

Type of glass

Rare gemstone

Artificial glass made from volcanic ash

Zinc-iron sulfide mineral

Type of glass

Rare gemstone

Aluminosilicate mineral

Green natural glass possibly formed by a meteorite impact

Nodule-like rock, that is formed within rhyolitic volcanic ash layers

Rare gemstone

Zinc-iron sulfide mineral

Type of glass

Aluminosilicate mineral

Green natural glass possibly formed by a meteorite impact

Process to enhance a gemstone's optical properties