Rare Luminesce Hiyalite shop Opal

Product Name: Rare Luminesce Hiyalite shop Opal
from Zacatecas Mexico. Amaze your friends with this gem that glows like kryptonite! Hyalite gets its name from its bubbly glass-like appearance. Hyalite is a word that means glass-like. But it has a couple of very interesting &unique physical properties that I'd like to talk about. There's a property of glowing under u.v.light. When lit with a long-wave ultraviolet, you can see it glows very brightly.The 2nd property relates to the shop reason that this material is fluorescent. Hyalite acquires a property of fluorescence due to trace amounts of contaminating uranium.It's the presence of uranium in the opal that causes the fluorescent response under uv light.It is in levels too small to even penetrate the skin.Hiyalite glows not only under a ultraviolet light it will also glow strongly in daylight particularly diffused daylight. Only opal that does this! This is a large Hiyalite Opal at 18.25 carats.. 9" long,. 7" wide. THIS IS AN INCREDIBLY RARE AND EXPENSIVE OPAL!.