Dow Harris

Mon, 20 Mar 2017 22:15:09 +0000

The 14.02-carat Spinel from Sri Lanka is exceptional for its intense violet-blue color. Spinel is a magnesium aluminum oxide and forms when impure limestone is altered by heat and pressure. They are commonly found in occurrence with corundum (ruby and sapphire) and have historically been confused with each other due to their many similarities. Both minerals are hard, yield durable gems, and form in a range of colors.The major sources of spinel gemstones are Burma, Sri Lanka, and Thailand.


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    Gem Rose Spinel Burma This oval-shaped gem spinel is characterized by a distinctive rich rose color. Both its clarity and luster are excellent. This is an excellent choice either for the serious collector or for the designing jeweler. Such fine Burmese material is exceedingly rare in today's market. Weighing approximately 8.29 carats and measuring 14.0 x 11.0 x 6.0mm

    Outstanding Trillion Tanzanite Gemstone (4.35) 12x12 mm Tri-Cut Rated: 5 / 5 based on 5 customer reviews $760 In stock Product description: The deep blue of the tanzanite is fantastic, and runs from u

    Pala International's Featured Stones 2009-2011 Blue spinel from Vietnam, 2.59 carats, 9.0 x 7.0 x 4.8 mm. Note: This stone has been sold. (Photo: Mia Dixon) In fact, we even had this most recent blue spinel (above) tested for cobalt at the Tucson show, at the GIA Show Service Laboratory. In the end the lab was able to find the presence of cobalt through the Chelsea filter, which glowed cherry red when illuminated.

    Pure spinel is colorless, but impurities give rise to a range of colors, most typically pink or red, but also purple, green and blue. Spinel is a magnesium aluminum oxide and forms when impure limestone is altered by heat and pressure. They are commonly found in occurrence with corundum (ruby and sapphire) and have historically been confused with each other due to their many similarities.

    Genuine Purple Sapphire Loose Gemstone, Purple Violet Color, Oval Cut, 9.4 x 7.2 mm, 3.27 Carats at BitCoin Gems

    Single Tourmaline. An amazing Indicolite Tourmaline weighing 3.13cts from Tunduru, Tanzania. The stone is perfectly fashioned and the deep slightly greenish blue color is exceptional. Blue is one of the rarest and most valuable colors tourmaline can occur in and even stones like this at just over 3cts., are extremely rare and sought by collectors and connoisseurs. The word Indicolite is derived from the Latin word, meaning "indicum plant".

    Item in Stock and ready to ship == 13.03 ct Golden Orange Sapphire 14.47 mm x 13.2 mm