All Categories / Any Stones / Sphene / Old items appear last
Sphene is an unusual, beautiful, rare, but much underappreciated and undervalued gemstone. It is virtually unknown to the public and therefore ignored by jewelry designers, despite for it's mesmerizing green color and striking brilliance, exceeding the fire of in diamond and showing flashes of gold, yellow and green under the sunlight. The "fire" of Sphene derives from its very high dispersion and combined high index of refraction.
All Categories / Any Stones / Morganite / Old items appear last
Formerly known as pink beryl, the name Morganite was suggested by gemologist George F. Kunz the namesake of kunzite, and renamed as a separate gemstone in 1911 after J. Pierpont Morgan, an American banker and collector. This pretty, peachy-pink variety of beryl, like this 14.20-carat portuguese cut gem, is found chiefly in Brazil and Madagascar. Intense colors are hard to find and even light colors may command high prices. Pastel pink colors are a result of the presence of manganese or cesium.
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Chrysoprase is sometimes referred to as “Australian Jade” due to its resemblance to Burmese imperial jade. These unusually transparent and beautiful blue green pieces from the Yerilla deposit in Western Australia, some 100 miles north of Kalgoorlie.
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The chrysoberyl family is best known for the more valuable alexandrite and cat's eye varieties, but faceted chrysoberyl is a beautiful gemstone which is not as well known in its own right. Apart from the high hardness, it takes a good polish and has a good luster. We got this 8.27 carat chrysoberyl from Sri Lanka for the attractive canary color and the outstanding cut. A few very small inclusions are visible, but for many people, the stone would be eye clean.
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There are three indisputable kings of green in gemstones: Emerald, Tsavorite and Jadeite. Everyone loves green in at least one of its many shades, but not everyone is keen on expensive fragile emeralds or jadeite. So here is our list of 10 other unusual or more obscure examples of green gemstones. 1. Demantoid (Garnet) 2. Green cat’s eye quartz 3. Green Zircon 4. Sphene 5. Vanadium Chysoberyl 6. Green Kornerupine 7. Chrome Tourmaline 8. Green Aquamarine 9. Maw Sit Sit 10. Green Vesuvianite
All Categories / Any Stones / Zircon / Old items appear last
Beautiful 8.63 cts greenish yellow natural Zircon from Tanzania. Zircon is known for its distinctive beauty and occurrence in a broad range of colors. It can be blue, green, colorless, brown, red, orange or yellow. Because of its similarity to diamond, colorless zircons have also been popular for years.
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Scapolite, which is derived from Greek meaning "rod" or "shaft," has a density of 2.57-2.74 and a refractive index of 1.540-1.579, properties identical to quartz. It was discovered in 1913 in the Mogok Stone Tract of upper Myanmar where it occurs as white, pink, or violet distinctly fibrous stones.
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This untreated 20.46 carat beryl from Madagascar can’t seem to decide if it’s green or blue. Every time we changed the lights, the angulation of the stone to the lights, or the background, the color would shift from light green to gentle blue. This is common in strongly trichroic or dichroic gemstones and its one reason why the color is so difficult to capture and describe in these kinds of stones.
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Chrome Tourmaline from East Africa is a very attractive shade of green which derives it’s unique coloration from the presence of chromium or vanadium. Since Chrome Tourmaline is much more rare and valuable than ordinary green Tourmaline, chemical analysis has become an increasingly important part of accessing tourmaline value.
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These rare collector gems could almost pass for Tanzanites or lavender Spinels but they’re Axinites. Although they’re mined together with the Tanzanites at the Merlani deposit, they’re much more uncommon and we’re rarely able to buy more than a few pieces at a time.
All Categories / Any Stones / Ruby / Old items appear last
There has been a revival of interest in unheated rubies and some people are even willing to accept less colorful and less transparent gemstones provided they have not been heated. So, here is an example of classic diagnostic inclusions in unheated corundum. The prominent crisscross orientations of undissolved silky rutile in this unheated ruby provide positive proof of the stones natural progeny. High temperature heat treatment would dissolve the needles and could make the stone nearly clean.
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What are trendsetting gemstones of 2015? From the well known classics like Sapphires and Alexandrites to more obscure stones like Mawsitsits and Danburites, these were the top 10 color gemstones selected by Multicolour.com customers in 2015.
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Most of the gemstones on the tray are chrysoberyls, and possibly a few alexandrites – all from Tunduru, Tanzania. The bottom left is cats’eye and the one above is vanadium chrysoberyl. We always process the alexandrites first because they represent the highest value, by using a fiber optic directed across the stone and perpendicular to the line of sight to search for inclusions and cracks which help determine the orientation of the cut.