Mohs hardness scale, with a lot of minerals reviewed. I searched a while to find a comprehensive list of Mineral hardness and this is the best I could uncover.Thing of Interest
Smoky quartz. Source: New Mexico, United States of America.
Schorl (Black Tourmaline) Erongo Mountains Namibia
Geode with pink crystals - how to hunt for geodes.
Quartz that looks like it carries a Galaxy
The rose quartz's amazing energy. www.soullightandlove.com
Poster of rock & minerals, showing classification of
Azurite-Malachite-188417 - Copper mining in the United States - Wikipedia, the free encyclopedia
Garnet, The January Birthstone click on link and then type in search box , month birthstone (ie february birthstone) to see the infographic for each month.