This is a rare gel Bustamite cabochon. This material grows with Sugilite and Richterite, but is more rare than both. This high quality little beauty has excellent saturation of color as well as even coloring throughout the entire cabochon. Location: South Africa. Dimensions: 1.05" x 0.32" x 0.13". Weight: 1.7g, 8.5ct. sku: 16F935.