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Could Quartz Scratch Corundum?

Chloe Bennett • Oct 12, 2026 • 5 min read

Could Quartz Scratch Corundum?

Quartz is a 7. It can be scratched by topaz, corundum, and diamond. Quartz will scratch minerals that have a lower number on the scale.

Can a diamond scratch corundum?

The only hardness test that will identify a diamond is scratching corundum. Corundum, which includes all rubys and sapphires, is 9 on the hardiness scale. If your suspected diamond crystal can scratch corundum, then there is a good chance that you found a diamond. But NO OTHER HARDNESS TEST will identify a diamond.

Can corundum scratch itself?

Only a diamond can scratch a diamond. Corundum can scratch itself, topaz (8), quartz (7), and anything softer.

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Chloe Bennett

Chloe Bennett explores the intersection of pop culture, streaming entertainment, digital trends, and contemporary lifestyle. Her weekly commentary reaches thousands of culture enthusiasts.