中等大小的天然黑色宝玺原石。清除负能量，这是任何水晶爱好者收藏的必备品。大约 1 1/2" x 1" 厚。来自巴西
 
Medium chunks of natural rough black tourmaline. Clears negative energy, a must-have in any crystal enthusiast collection. About 1 1/2" x 1" thick. From Brazil