The gemstone "ruby" is actually with traces of some elements -----:

A ) Pure Rubidium

B ) Aluminium Oxide ✅

C ) Rubidium Oxide

D ) None of these

Related Questions
  1. Which element is used to remove the permanent hardness of water?
  2. Which element is known as the king of metals?
  3. The chemical symbol for the calcium is----:
  4. Which element is used in making light bulbs?
  5. Gem stone Blue Sapphire know as Neelum, due to ---------?
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