The Mohs scale of hardness is a comparitive technique, usually used for minerals. It rates the hardness of materials on a scale of 1 to 10 based on a simple scratch test.

Discover the hardness of tanzanite gemstones in our comprehensive beginner's guide. Learn more about this stunning gem and its durability.

The MOHS Hardness Scale is universally used as a way of distinguishing minerals, starting with talc at 1, being the softest mineral and ending with diamond at 10 being the hardest mineral.

The reason is somewhat simple: objects only scratch objects that are softer than their own hardness. Corning has not publicly released a Mohs scale of hardness for any of the three versions of ...