Weight: 8.0 oz. Size: 3" at longer side. Superior Quality Collectible Single Piece. Each piece is unique with intricate crystallization pattern. Perfect gift for Birthdays, Christmas, Home or Office Decoration. Excellent Geological Educational Specimen for Teachers and students. Shipping: Free basic shipping. Expedite shipping for added cost. Package size 6" x 6" x 2". General Information: Amethyst's purple color comes from trace amounts of iron replacing some of the silicon atoms in the quartz, combined with natural radiation. The color can range from light lilac to deep royal purple, and sometimes has a brownish tint.