A rare, lustrous, doubly terminated, golden-brown and dark chocolate-brown buergerite crystal from the one-time fine in Mexico. A rare example of this tourmaline varietal that was found once, in the 1960s, by a miner who brought the lot to Tucson for sale. He died shortly thereafter and to my knowledge nobody has yet rediscovered his locality, an aberrant topaz-bearing rhyolite somewhere out in the desert in this region. In person, the crystals have a unique and characteristic golden sheen to them. This rarity is complete-all-around and nearly pristine.