• Location: Indonesia
• Weight: 1.8g = 9ct
• Size: 2.2 x 1.4 x 0.2 cm
• DETAILED DESCRIPTION

Indonesian opals are predominantly found on the islands of Java and Borneo, with minor deposits also occurring in Sumatra. Compared to the well-known Australian mining areas, these stones are less widespread. They are mostly of volcanic origin, formed where silica-rich solutions are deposited in rock fissures in regions of intense volcanic activity. Their colors can range from milky white or grayish tones to dark, sometimes almost black, hues. Under certain lighting conditions, some specimens display a subtle iridescent play of colors. So-called "wood opals," which form when ancient wood is permeated and fossilized, are also quite common. These often retain visible organic patterns from the original material. Opal mining in Indonesia is not as extensive as in some other countries, which partly explains the lower global awareness of these stones. Mining is frequently done by hand, with minimal mechanization, and many specimens are subsequently cut and polished. Indonesian opals are valued primarily for their exotic origin. They are rarely exported in large quantities, which makes them a rare and sought-after addition to collectors' portfolios. Indonesian Opal – Cabochon – Indonesia