Mohs Gemstone Ranking


The Mohs ranking refers to the material's ability to resist abrasion or scratching. Mohs uses a scale of 1 to 10. One being the softest and ten the hardest. Non gemstones such as pearls coral and jet are also ranked by jewelers using the Mohs Ranking.

A diamond would be rated a ten and a four would be Rhodochrosite (also known as a Inca Rose Stone).

 

THE MOHS RANKING SYSTEM WAS DEVISED BY A GERMAN MINERALOGIST NAMED FRIEMRICH MOH IN 1812

 

Talc 

Soapstone, Stichtite
1

Gypsum 

• •

Amber, Jet
2

Calcite 

• • •

Pearl, Coral
3

Flourite 

• • • •

Rhodochorosite, Malachite
4

Apatite 

• • • • •

Opal, Turquoise
5

Feldspar 

• • • • • •

Moonstone, Amazonite
6

Quartz 

• • • • • •

Amethyst, Citrine
7

Topaz 

• • • • • • • •

Emerald, Aquamarine
8

Corundum 

• • • • • • • • •

Ruby, Sapphire
9

Diamond 

• • • • • • • • • •

Diamond is 1500 harder than Talc!
10