Hydroboracite

Unknown Owner

Help improve this recordNo owner is registered for this specimen yet. If it's yours or you know more about it, you can add the owner, provenance, publications and other details.

Emplaced on a color-contrasting gray matrix that is actually a mass of large gorgeyite crystals, is a cluster of discrete rosettes of lustrous, light lemon-yellow hydroboracite. The color may be due to the presence of preobrazhenskite. The largest rosette measures 1.6 cm across. Only rarely does this species crystallize in specimens of this quality. I have seen just a handful, presumably all from one freak pocket, of this material over the years. Jack purchased this in the mid-1990s as much interesting Russian material flowed out to market, not for the rarity at all, but because it was simply pretty in a style and form unique compared to other minerals. Ex. Jack Halpern Collection.