Mineral Monday is a weekly video series exploring the many amazing minerals, fossils, and historic objects on display at the W.M. Keck Earth Science and Mineral Engineering Museum as told by museum ...

QUESTION: What makes rocks hard? ANSWER: When you go out for a walk and look at the stones around you, you will see that there are big stones, small stones and tiny ones. All these stones are pieces ...

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 ...

Happy Mineral Monday! This week, we look at the mineral Talc. This soft mineral sits at a 1 on the Mohs Hardness Scale, and when ground up becomes a common household powder. Any guesses what that ...

The hardness scale was created by trying to scratch one mineral with another. It was then recorded which mineral left a scratch. For example, Corundum, (Ruby and Sapphire) was used to scratch Apatite.

According to Apple, the iPhone 8 and 8 Plus have the most durable glass on a smartphone. During the scratch test, the iPhone 8’s screen developed deeper grooves on level 7 of Mohs Hardness Scale. This ...