HICH Quiz - Rocks and Gemstones Trivia

Which rare and valuable gemstone is a blue variety of the mineral corundum? #RocksTrivia #Hard

Sapphire

Ruby

Emerald

Amethyst

The Taj Mahal, one of the Seven Wonders of the World, is constructed from which mineral? #RocksTrivia#Hard

What is the hardest natural mineral on the Mohs hardness scale? #RocksTrivia#Hard

Corundum

Topaz

Quartz

Diamond

Rocks and Gemstones Trivia