20hhgd.is ((SCHORL, ORTHOCLASE, SIDERITE, OPAL variety OPAL-AN)), FLUORESCENT, $135 MINIMUM BID, Erongo Mountains, Karibib Constituency, Erongo Region, Namibia, 14 x 10 x 3.5 cm, Cabinet | |
Great combination specimen with undamaged white Orthoclase blocky crystals, lustrous black Schorl crystals and brown opaque rhombs of Siderite. Solme crystals have a whitish crust like coating which is actually Opal variety Opal-AN or Hyalite Opal. These areas come alive as bright green under UVSW light. ex Glen Davidson collection. |