Free Form Green Opal – Polished Display Specimen OVERSTOCK Each piece unique

Each piece unique

making them formidable nocturnal predators in the natural world

ensuring you receive an exceptional example of this remarkable species

scientific researchers

Free Form Green Opal – Polished Display Specimen OVERSTOCK Each piece uniqueA beautifully polished free form specimen of Green Opal, hand cut with a flat base for effortless display. Each piece is graded by weight, so dimensions will vary naturally, and the unique character of each stone in colour, pattern, shape, and finish means no two specimens are alike. Green Opal is a common Opal formed from a silica rich solution of silicon dioxide and water. As water percolates through the earth, it picks up silica from sandstone;