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Rock Name (optional)
Hardness
5 · Apatite
1 Talc
10 Diamond
Test: Scratched by a knife blade with effort (~5.5)
Luster
Metallic
Submetallic
Vitreous
Dull/Earthy
Pearly
Greasy
Primary Color
Streak Color
Unknown
White
Grey
Black
Red-brown
Yellow
Green
Greenish-black
Colorless
Rub the stone on unglazed porcelain — the powder colour.
Quick Field Tests
Sticks to a magnet
Glows under UV light
Fizzes with vinegar / acid
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