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
Black Oval Cabochon Opal Lightning Ridge, New South Wales, Australia Even within the category of black opals, some are more sought-after than others. The present stone is such a piece—surpassed by few other opals in terms of its vibrancy of color—a true 5/5 for vividness and presence of color. Distinctive also is its "flagstone" pattern play-of-color: dominated by broad patches of electric blue, purple, green and orange at the edges and centering on a "windmill" pattern of fiery red…
Very Fine Black Opal from Lightning Ridge, Australia. Vivid and very "present", this fine gem opal displays predominantly red play-of-color with spectral broad flashes of green, orange, yellow and blue, with true black potch to the reverse of the oval cabochon. This is as fine a stone for the serious collector as can be desired. Weighing approximately 10.39 carats and measuring 16.5 x 13.0 x 6.5mm Estimate: US$ 60,000 - 80,000 (£39,000 - 52,000/€46,000 - 62,000)
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 vibrant green, blue, orange and hints of yellow, unpolished to the reverse side.
Black Opal is Australia’s national gemstone, and black opal is the rarest and most valuable of its kind, at times selling at prices that rival the best diamonds. The stone must have a rich, black background, but base colors come in all shades of gray, which is why opinions vary on what is a “true” black opal. Found in the Lightning Ridge area in northwestern New South Wales, black opals are natural, solid stones that absorb scattered white light, giving it brilliant spectral c
Spicy dark yellowish orange Spessartite oval weighing 13.100 cts. Like all garnets, this spessartite garnet ise untreated, so the beautiful color and clarity that you see, is just as nature created. More @ www.multicolour.com and #gemstones