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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. Before 2005, only three serendibites were thought to be in existence, all from Sri Lanka.

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.

Colored Gems at the Oscars: Part 1 | GIA 4Cs Blog

When the trace elements of the mineral species corundum are iron and titanium, the corundum is blue sapphire.

3.16 cts natural pigeon blood red ruby mozambique gem 1$ nr

3.16 Cts Natural Pigeon Blood Red Ruby Mozambique Gem 1$ NR

No Reserve Gemstone Online Auctions Auction Gem Rock Auctions

Gem quality sphalerite is a rare collector stone. The mineral is usually nearly black in color but is occaisionally found in transparent pieces of an orange or yellowish brown hue. Clean pieces are extremely rare. More @ www.multicolour.com and #gemstones

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.

The finest gem quality Kyanite may be confused in appearance with spinel or blue sapphires from Burma. Kyanite name derives from the Greek word “kyanos”, meaning deep blue. It occurs in light to dark...

The finest gem quality Kyanite may be confused in appearance with spinel or blue sapphires from Burma. Kyanite name derives from the Greek word “kyanos”, meaning deep blue. It occurs in light to dark.

Black Opal from Lightning Ridge, New South Wales, Australia

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

Extremely Bright [10.75cts]; Extraordinary Flashes of Multi-color Museum Welo Opal.

Extremely Bright Extraordinary Flashes of Multi-color Museum Welo Opal Wow this one is really bright with colors

Multicolour.com - COLOR CHANGE GEMSTONES

Color change gemstones Most gemstones show some color shift under different light conditions and this is always apparent when we change between incandescent, fluorescent, and daylights for.

Color Change Garnet is one of the most rare, interesting, and phenomenal of all gems and the only example of blue garnet. In the past, gemological literature referred to garnet as occurring in every color but blue, but this is clearly not the case anymore and some Madagascan and Tanzanian color change garnets are indeed blue under the right light conditions.

Color Change Garnet Alexandrite garnet Color Change Garnet is an intermediary garnet between Pyrope and Spessartite in the garnet triangle.

Fine quality ‪#Petalite‬ 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 3.84cts we just received from Brazil.

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 2007, 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 4th largest faceted VVS or better Benitoite for the species. Weight: 8.06 ct., Origin: San Benito County, California USA, Size: 13.82 mm x 10.44 mm x 7.35 mm, Color: Dark Blue, Violet, Shape: Oval, Modifed Brilliant Cut, Treatment: None, 100% natural

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

RARE GEMSTONE: CUPRITE - 93.6 CT. 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-only find at the Emke Copper Mine. The stunning, deep ruby red color can best be appreciated under strong incandescent lighting or in transmission.

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

black opal

Beautiful mystic black opal - I want to add this to my rock collection some day.

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