Madelynn Cassin Designs

Handcrafted from Concept to Completion

MOHS - How hard is your stone?

Madelynn CassinComment

What is the Mohs scale? 

The Mohs scale of mineral hardness is a qualitative ordinal scale that characterizes the scratch resistance of various minerals through the ability of a harder material to scratch a softer material. It was created in 1812 by the German geologist  and mineralogist Friedrich Mohs and is one of several definitions of hardness in materials science, some of which are more quantitative.  Source (https://en.wikipedia.org/wiki/Mohs_scale_of_mineral_hardness)

Stones we love to use:

  • Diamond - 10
  • Moissanite - 9.5
  • Sapphire - 9
  • Ruby - 9
  • Spinel - 8
  • Topaz - 8
  • Emerald 7.5 -8
  • Aquamarine - 7.5 -8
  • Morganite - 7.5-8
  • Tourmaline - 7- 7.5
  • Citrine - 7
  • Garnet - 6.5 - 7.5
  • Oregon Sunstone 6.5- 7
  • Peridot 6.5 -7

For rings that are going to experience long term daily wear, such as an engagement ring,  we always recommend a hard stone to go with a more durable metal such as 14k Gold. 

For great facts about all kinds of gemstones, including our favorites, check out GIA's Gem Encyclopedia