Tangerine Aura Quartz Crystal Beautiful Tangerine Aura Quartz Crystal. The color is reported to be due to hematite and/or iron. The healing energy is fantastic. Please note that you are buying a single stone. The photo shows typical ones. All are different. You will be pleased... we guarantee it. Crystal ranges in size from 3-3 1/2 inches in length. Approximate weight is 11 grams.