Crystals to make astrogems. Add 1.5 grams to a 2 oz. jar of underglaze, Amaco Velvets, Duncan Cover Coats or Mayco UG.
I pint jar (goes a long way!)
WARNING: This product can expose you to chemicals including Silica, crystalline (airborne particles of respirable size), which are known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.