Johachidolite with Phlogopite

specimen number:
2133273

location:
Pyant Gyi Mine, Pein Pyit, Mogok, Myanmar

description:
A good rich example for this rare species with orange slightly translucent johachidolite throughout this matrix with phlogopite.

The Pyant Gyi Mine, located in the Pein-Pyit area of the Mogok Stone Tract in Myanmar, is a unique geological site famous for hosting some of the world's rarest borate minerals. Geologically, the mine is situated within the Mogok Metamorphic Belt, where high-grade regional metamorphism and metasomatic activity created skarn deposits within marble units. It is the premier locality for johachidolite, an extremely rare calcium aluminum borate mineral that occurs here as transparent to translucent, pale yellow to orange-yellow vitreous masses and occasional distinct crystals. Historically, while Mogok has been mined for rubies and sapphires for centuries, the specific recognition and extraction of rare species like johachidolite at Pyant Gyi gained significance in the late 20th and early 21st centuries. The mine operates primarily as a small-scale underground and open-cast venture, with intermittent production dictated by the discovery of new mineralized pockets. Because of its geological complexity, Pyant Gyi remains a critical location for mineralogists studying the rare-element chemistry of the Myanmar gemstone belts.

Questions about this specimen?
Send an email or call us: 314-341-1811.