Astro West Loose Gemstones

This gigantic over 113 carat faceted clear blue oval cut aquamarine is out of Brazil, the world’s most important and largest commercial source of gem-grade aquamarine – having produc...

This stunning oval nearly 10 carat genuine alexandrite – a rare color-change Alexandrite of this size is almost impossible to find on the market. The stone changes from a lavish fier...

This natural diamond single crystal out of Canada weighs 27.03 carats and has salt and pepper coloration due to natural inclusions in the crystal lattice structure. It displays beaut...

This lovely sky blue aquamarine has been cut in a rectangular step cut for a stylish and unique display of its stunning clarity. It is out of Brazil, the world’s most important and l...

This flawless faceted and polished bicolor tourmaline specimen from Brazil features deep green to blue and then to a rare chrome-yellow hue and incredible, glasslike clarity. tricolor tourmaline...

This huge over-100 carat kunzite is internally flawless and drenched in pink from the manganese content of the stone. Out of California, it will make a show-stopping piece of jewelry. From the Pala Chief Mine in San Diego County, California, this 101.40 carat cushion cut kunzite...

This tremendous over 12.50 carat green-brown round cut garnet var. demantoid from Madagascar displays a few horsetail inclusions. Commonly found in this rare species of garnet, the i...

Mexico Opal is composed of hydrated silica. It is an amorphous silicate, meaning it does not form crystals. Opals are structurally composed of tiny spheres of silica which, when arranged in perfect geometry, create the famous play of color associated with the stones. The symmetrical arrangement of silica balls acts like a prism, which allows the rainbow spectrum of colors to be visible to the naked eye. Fire opal is a transparent to translucent opal with warm body colors of yellow to orange to red. Although it does not usually show any play of color, occasionally a stone will exhibit bright green flashes. The most famous source of fire opals in Mexico is in the state of Queretaro; these opals are commonly called Mexican fire opals. Fire opals that do not show a play of color are sometimes referred to as jelly opals. Cantera opal...

This huge 230.25 carat completely natural and lustrous black diamond is the most unique treasure you will ever buy. Scientists agree that these rare gemstones may have been formed in...

This lustrous rough black diamond mined in Canada weighs a hefty 71.19 carats. Black diamonds owe their opaque color to natural impurities in the crystal lattice and make beautiful c...

This very lustrous, large rough black diamond mined in Canada weighs 91.40 carats and has crystallized in a natural cube shape. Black diamonds owe their opaque color to natural impur...

This lustrous, huge rough black diamond mined in Canada weighs 251.76 carats. Black diamonds owe their opaque color to natural impurities in the crystal lattice and make beautiful co...

This lustrous, large rough black diamond mined in Canada weighs 64.92 carats. Black diamonds owe their opaque color to natural impurities in the crystal lattice and make beautiful co...

This extremely lustrous and large rough black diamond mined in Canada weighs 86.22 carats. Black diamonds owe their opaque color to natural impurities in the crystal lattice and make...

This natural white diamond single crystal out of Canada weighs 9.03 carats and displays amazing translucency and clarity. With beautiful luster and sharply-defined crystallization, i...

This sparkling eye-clean oval-cut rubellite – a pink variety of elbaite, the most prized species of tourmaline – comes from Afghanistan and is well-faceted and perfectly balanced. An...

This modified trillion cut peridot from Pakistan displays an olive green hue and good clarity with a chromite inclusion. The very large crystal of...