What is the Mohs scale? And why does it matter when it comes to crystals? Have you ever wondered how we measure the hardness of minerals? The Mohs scale is a simple tool that ranks minerals from 1 (softest) to 10 (hardest). Learn here why this is important and what crystal’s hardness will tell us how it will wear, how to care for it, and how it interacts with other minerals. Find out where a piece of quartz sits on the Mohs scale…. 💎 | Crystal Castle