Mohs Scale of Hardness
From softest to hardest
Talk about the gypsy hum-fest Call City Hall One flew right over the cuckoo’s nest His appetite was in free fall Author Clay is felled sparring Quits to puzzle where he’s at Cor! Run! Dumbo’s soaring Don’t want to die man, done by a pat!
[Talc, Gypsum Calcite Fluorite Apatite Orthoclase (feldspar) Quarts, Topaz Corundum Diamond]
Talk about the gypsy hum-fest Call City Hall One flew right over the cuckoo’s nest His appetite was in free fall Author Clay is felled sparring Quits to puzzle where he’s at Cor! Run! Dumbo’s soaring Don’t want to die man, done by a pat!
[Talc, Gypsum Calcite Fluorite Apatite Orthoclase (feldspar) Quarts, Topaz Corundum Diamond]