Hyalite Opal, Gallatin Co.,MT, with sawed base, great display, Fluorescent(!)

Description

Hyalite Opal, Fluorescent, from Montana! Even though crusts of Hyalite Opal have been known from Montana for decades, good quality specimens are rarely seen on the market from the state. A new claim in Gallatin Co., MT, has recently produced specimens of a quality rare to the state, more reminiscent of classic Mexican and Hungarian Hyalite Opal. I will post a number of these pieces in the upcoming period.
The here presented example is great for the species, as well as Montana as a locality, but also for collectors of Fluorescent minerals. Apologies for the poor photo's, as Hyalite is difficult to photograph, short of a professional photography set up, leave alone out of hand with a Phone camera....
As seen, this is a larger specimen, if Hyalite on a matrix of Basalt, with a sawed base, to enhance the display value. This specimen has a few great "ridges" of Hyalite Opal, as well as an area in the center, where a different variation of Opal, likely of different temperature formation, and a different "generation". The fluorescence, as with all of these, is truly spectaculair under a shortwave
This piece is 103 grams, or a good 3.5 OZ. Size is 3x3x0.8 inch