ITEM NAME:Black Crystal Tourmaline Rough Stone Rock Mineral Specimen Healing Decor Descriptio n Description: 1. Automatic release of Far infrared; 2. Subjected to various external forces can release negative ions; 3. use: jewelry, Sweat room, interior decoration, textile, paint, Ceramic building materials, drinking water purification, household, electronic products and other fields Specifications: Material: Electric Stone Color: Black Size: 2cm diameter Package Included: 1 bags Note: 1. Due to the light and screen difference, the item's color may be slightly different from the pictures. 2. Please allow 0.5-2 cm differences due to manual measurement. High quality buy, happy buyï ¼ Black Crystal Tourmaline Rough Stone Rock Mineral Specimen Healing Decor.Specifications:Material: Electric Stone. Due to the light and screen difference, the item's color may be slightly different from the pictures. Color: Black. We'd like to settle any problem in a friendly manner.