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added by Ts Dec. 25, 2017, 11:22 a.m.
The only color which sapphire cannot be is ...
orange
yellow
red
black
The only color which sapphire cannot be is red – as red colored corundum is called ruby, another corundum variety. Pink colored corundum may be either classified as ruby or sapphire depending on locale.
Ts
0
Correct this question
wikipedia → Sapphire
3
Very interesting!
reach: rather globalminerals

Votes

+2 Very interesting!  globalquiz.org
      Acceptable  olorion
+1 Very interesting!  misanthrope
      Acceptable  th3pizgat0r