Visit Glitter Mountain: Important Things to Know Before You …
You can find gypsum at Glitter Mountain. One of the main identifying characteristics of gypsum is its hardness (or lack of hardness). Gypsum is a 2 on the Mohs Hardness Scale and you can scratch it with your fingernail. One of my favorite features of selenite (the form of gypsum that's at Glitter Mountain) is the transparent columnar structure.
