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Two common gem varieties of the mineral corundum are ___ and ___. A: halite; fluorite B: ruby; sapphire C: amethyst; citrine D: hematite; magnetite
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Two common gem varieties of the mineral corundum are ___ and ___.

A: halite; fluorite

B: ruby; sapphire

C: amethyst; citrine

D: hematite; magnetite

User Aarreoskari
by
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1 Answer

5 votes
The answer is B. ruby; sapphire
User TheLettuceMaster
by
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