This beautiful,medium/larger size double terminated, raw Tibetan quartz with carbon inclusions, known as a Black Spot Quartz. The quartz size is approx. 45 mm in length, and approx. 65 mm in circumference. I placed it on a brown leather cord, which has slip knots to adjust the length. You will receive the exact necklace shown in these photos. Tibetan quartz crystals are powerful crystals, and are estimated to be around 100 million to 150 million years old! They can gather,hold and release very high energy. These quartz crystals are mined in the Himalayan mountains of Tibet, and are excellent for healing work, and changing negative into positive energy. Tibetan crystals are said to have the ability to receive or transmit energy from both ends.