19.30 Ct. Ethiopian Opal from the Collection. Broadflash - Height: 22 mm - Width: 18 mm- 3.86 g

Splendid specimen of Ethiopian opal of quality. White-based crystal with an intense play-of-colour effect dominated by rainbow hues with a broadflash pattern. A top stone for collectors, photographed perfectly dry.
Description Specifications
An opal is a hydrated form of silica with a water content ranging from 3 to 21%. Indeed, it is this permeability to water that makes it a hydrophile.
Opals are deposited at a relatively low temperature and may occur in the fissures of almost any kind of rock, being most commonly found with limonite, sandstone, rhyolite, marl, and basalt. Only precious opals show a variable interplay of internal colors.
At microscopic scales, precious opal is composed of silica spheres approximately 150 to 300 nm in diameter arranged in a hexagonal or cubic close-packed lattice. These ordered silica spheres produce the internal colors by causing interference and diffraction of light passing through the microstructure of the opal.
There is no text provided to translate.
Additional Photography Settings
All items are photographed individually with a high-resolution camera in macro zoom mode indoors, using LED lighting at 5000 Kelvin, the color temperature closest to sunlight. The photos are not altered in any way, except for cropping.
Assistance
You can contact us at any time through Catawiki messaging for any further information about the item of your interest, and we will try to respond as soon as possible.
Shipping
Worldwide shipping with Registered Mail and tracking number. We offer combined shipping to ensure maximum savings on postal costs.
Restitution
We always strive to do our best, but if something is not to your liking, in accordance with regulatory provisions and our own conviction, we guarantee a refund to any customer who is not satisfied with their purchase, regardless of the reason.
Thank you for your attention and Happy bidding!