Geologists do it according to the Mohs Scale of Hardness. There. That’s your “hardness” joke for the post. Now down to business, with the hardest (and softest) scale there is. In 1812, people had just ...

The Mohs hardness scale is a relative scale usually used for minerals and does not involve any measurement of deformation, as do other quantitative methods. It simply involves the assignment of a ...

This article was published in Scientific American’s former blog network and reflects the views of the author, not necessarily those of Scientific American Talc - Gypsum - Calcite - Fluorite - Apatite ...

Have you ever wondered what the hardness of tanzanite is? But before that, let’s understand what a Tanzanite is. It’s a pretty blue-violet gem that belongs to the mineral group. Think about strolling ...