Turquoise has a hardness of about 6. Which two materials could turquoise scratch?
A. Gypsum
...
Mathematics, 12.12.2021 04:20, lrasanaoaksandfurana
Turquoise has a hardness of about 6. Which two materials could turquoise scratch?
A. Gypsum
B. Quartz
C. Apatite
D. Topaz
Answers: 3
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