Mo0hs Scale of Hardness: The following is a chart of mineral gemstones and gemstone-like materials you're most likely to find in jewelry.

What is the toughest gemstone? Which ones are easily scratched? These questions are many more answered in our informative article on gemstone hardness. Moh...

The Mohs scale of mineral hardness is a qualitative scale that characterizes the scratch resistance of minerals. Check out for more info and mineral list

There are a wide range of gemstones used in jewellery, with each having its own characteristic colour – or, in some cases, a range of colours. The origin of these colours has a chemical basis…

The Moh's Hardness Scale is used to determine the hardness of gems. Which is your favorite gem?