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exis [7]
3 years ago
6

Two common gem varieties of the mineral corundum are _____ and _____.

Biology
2 answers:
Talja [164]3 years ago
7 0
Ruby; sapphire

Hope this helps!
Anarel [89]3 years ago
6 0
"B: Ruby; Sapphire". If you want to remember it for a test, or quiz, or something, think of it this way- "Pokemon: Ruby, Pokemon: Sapphire".
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