Serendibite is an extremely rare boron-bearing mineral that is only rarely found as facet grade material. There appear to be only two sources for gem quality serendibite, the Ratanapura area in Sri Lanka, and the Mogok stone tract in Northern Myanmar.
Gem quality sphalerite is a rare collector stone. The mineral is usually nearly black in color but is occasionally found in transparent pieces of an orange or yellowish brown hue. Clean pieces are extremely rare.
Classic Black Crystal Opal Lightning Ridge, New South Wales, Australia This fine and plump double-cabochon black crystal opal is the ideally suited to be mounted as a ring. A five out of five in terms of vividness and presence of color, the gem abounds in
Fine quality is quite rare and large clean stones are always in demand by collectors. The name petalite is derived from the Greek word "petalos" meaning leaf, an allusion to the cleavage. Pictured, colorless Petalite trillion weighing from Brazil.
Benitoite - In the owner of the Benitoite Gem Mine discovered a near flawless crystal weighing just over 34 carats. The crystal was faceted into 4 gemstones, the largest of which is this beauty. This is the largest faceted VVS or better Benitoit
Emke Mine, Ongangja, Seeis, Khomas Region, Namibia This rare gemstone is a companion piece to Lot 87011 on an earlier section of this auction. All large gemstones of this mineral are most likely derived from this one-time