Koroite Boulder Opal - 21,78ct
This finely patterned gemstone interspersed with colorful fine opal veins is a natural 34x24x4mm, Koroite Boulder Opal with sparkling green and blue opal veins. The gemstone was mined in Queensland, Australia and has a final weight of 21.78ct. This coroite boulder opal is completely untreated; no treatment of any kind has been done. The item is sold as seen in the picture.
