9chmrn ((rare BUERGERITE in RHYOLITE)), $10 MINIMUM BID, Mexquitic, San Luis Potosi, Mexico, 1.5 x 1x 1 cm, Thumbnail, | |
This is described as a rare variety of Tourmaline only found once in the 60's in the mindat.org listings. The crystals are terminated and double terminated lustrous undamaged and set in Rhyolite matrix. |