The Fracture Map Ring
Specs: TruSilver | 1.97g metal | Australian Boulder Opal 3.15ct | Treatment: None | Origin: Queensland, Australia — Miki Opal | Sizing: US 5.5
Description: This isn't a pattern. It's a map.
Boulder opal precipitates as amorphous silica within ironstone host rock — a Cretaceous-age ferruginous sandstone deposited when an inland sea covered central Queensland approximately 100 million years ago. Under magnification this 3.15ct heart reveals its internal architecture: neon green opal following branching, interconnected channels — the exact geometry of the original fracture network in the ironstone host, now filled with silica and preserved for 100 million years. The dark reddish-brown polygonal shapes are ironstone clasts: actual fragments of the host rock surrounded and cemented by opal.
The color variation — vivid electric green in one domain, deep royal blue in another — is produced by silica nanosphere diameter variation within those fracture channels. The ironstone matrix is not removed because it is the geological record of how this color came to exist.
Sourced from Miki Opal, a trusted Australian opal specialist with direct mine relationships. One of one.