RARE, lustrous, chocolate-brown buergerite crystals to 8 mm aesthetically scattered as isolated single crystals or in groups, on quartz rhyolite matrix from the ONE-TIME FIND in Mexico. A rare example of this tourmaline varietal that was found once, in the 60's, 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. 6.8 x 6.6 x 2.8 cm