Planerite with ''Hyalite'' Opal (Opal-AN) (rare locality specimen)

Item Description

Here we have an incredibly hard to find specimen from the Buckeye Mountain locality in Arkansas. The piece features grey-blue colored botryoidal Planerite associated with white/colorless "bead"-like Opal which is sitting on host rock matrix. Mountain Opal is labeled as "Hyalite", but is now classified as Opal-AN. I've never seen a specimen from this locality with associated Hyalite, but it's legit, and the species isn't even reported on mindat.org from Buckeye Mountain. The Hyalite does fluoresce under UV light as well. A really interesting and attractive association specimen for any fan of phosphate minerals or unusual association specimens. From the worldwide mineral collection of Albert Lewis Kidwell (January 1, 1919 - August 16, 2008). Al was a well-known mineral collector and research geologist with Carter Oil Company and later Exxon Oil Company in Houston, Texas. The phosphate species Kidwellite was named in his honor in 1974.