Material: Black Tourmaline. Size: approximately 2.3-2.9in(6-7.5cm). Total Weight: 6.34kg(13.9lbs), 18pcs. Color: as the picture. Quality: as the picture. Note: Some spheres may have natural stripes or crack on the surface, please watch video carefully. We sell our black tourmaline spheres in lots that are 18pcs, you will get the same of stones as in the photo and video.