50 Grams (UOM) 7mm - 10mm & 12mm - 16mm - These round flat back Cabochons are made of high quality dichroic patterned glass and are perfect for making necklaces, bracelets, pins, pendants, and other crafts. $39.93 | 12mm-16mm Dichroic Cabochons 50 grams 50 Grams of 12mm-16mm Flat back high quality Dichroic Patterned Glass Cabochons. Perfect for making necklaces, bracelets, pins, pendants, and other crafts. $38.73 |