Our tanzanite necklace is handmade with a raw tanzanite crystal in a rough cut dangling from a sterling silver eternity circle charm. Adds a boho accent to your look in a minimal style. Perfect for a December birthstone gift for those that love raw crystal jewelry. Stones are natural with a sparkling purple color and mined in Tanzania. The chain is a dainty cable in sterling silver that closes with a spring clasp. * Raw crystals are rough cut and can vary in size and shape. About Tanzanite: Tanzanite is found in a 5 mile radius in the Merelani Hills of Tanzania. Some tanzanite stones with display a pleochroic affect, meaning the stone will change color from a violet blue to light purple under different lighting. Materials: Natural tanzanite gemstone 10-14mm All metal components are 925 sterling silver If you have any questions just click "message seller" on our homepage. Thank you for visiting our jewelry shop, Linda and Joe .