Opal, variety, Hyalite, Gallatin county, MT, great quality, 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 examples are great for the species, as well as Montana as a locality, but also for collectors of Fluorescent minerals. This specific example is interesting, as it has two generations, or two 'materializations of Opals, one Hyalite, and one more like common Opal. As the photo shows, both are fluorescent.. 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....
The piece is 34 grams, or 1.25 oz, 2 inch in length, and one inch in height from base.
Please be advised, I ship with Priority shipping, small box.