Mohs scale

The Mohs scale of mineral hardness is a qualitative ordinal scale, from 1 to 10, characterizing scratch resistance of minerals through the ability of harder material to scratch softer material.

Back to Grading & Value →

Source: Wikipedia · Image: Wikimedia Commons · CC BY 3.0

JEWELPEARL

Pearls, understood — types and grading, sizing and care, and the calculators that take the guesswork out of buying and stringing them.

Get new guides by emailOccasional emails. No spam. Unsubscribe anytime.

InformationAbout Contact Privacy Policy Terms of Service Disclaimer Affiliate Disclosure Cookie Policy

Every entry, image, and fact is drawn from Wikipedia and Wikimedia Commons, used under public-domain and Creative Commons licenses. No content is AI-generated.