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Quiz "Gemstones"

Gemstones

an apple-green variety of chalcedony: a gemstone

Gemstones

a clear yellow form of beryl used as a gemstone

Gemstones

a type of opal that has a red or pink glow in bright light; fire opal

Gemstones

a brown glassy mineral consisting of iron aluminium silicate in the form of prismatic crystals: used as a gemstone. Formula: Fe2Al9Si4O11(OH)2

Gemstones

an emerald-green garnet found in chromium deposits: consists of calcium chromium silicate. Formula: Ca3Cr2(SiO4)3
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