We make calibrated cabochons from charoite, seraphinite, eudialyte, nephrite, and rhodonite and rainbow pyrite of the following sizes: oval and rectangle shape 8x10, 8x12, 10x14, 12x16, 13x18, 15x20, 18x25, 22x30 and 30x40mm; round and square shape 8, 10, 12, 15 and 18mm.