Monday, September 23, 2019

Fact of the Day: Sapphire Tough

Among naturally made minerals, sapphires are among the hardest on the Mohs scale. The only natural mineral that can scratch it is a diamond.  

4 comments:

Christine said...

Love sapphires

shwet said...

really, i don't know too much about sapphire.
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Pat Hatt said...

Scratch that may not always apply then.

Fundy Blue said...

Oh, the good old Mohs scale. It takes me back to my mineralogy classes. I love sapphires!