Purple, Included, Purple tourmaline oval

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The title is not a mistake made by my terrible typing.  When I see a purple tourmaline that is rich and with good saturation, I know that I probably have a copper bearing gemstone and a rare color to boot.  Unfortunately, the purple I can get out of Mozambique now (2013) is usually pretty heavily included,  but it is purple.  This smaller oval is sleepy from the inclusion and has a significant feather on  one side of the table.  Still it polish very well and is clean enough to flash its purple under both natural and incandescent light.  I bring up the stability of its color, because I just finish another purple and it is not stable.  It is larger and has a darker tone level, but the same color when I look at it under natural light,  But when I look at it under incandescent light all the purple leaves and the stone is gray!  I call the cuprian tourmaline that makes that color change “Laurellite”.  And why does one included purple oval not change color and the other included purple oval change color is a conundrum I wish I could solve.  And I have tried.

 

Bruce

About Bruce Fry

I was born in Summit, NJ in 1947 and graduated from Summit High School in 1966. I graduated from the Colorado School of Mines in 1970 and after spending another year in graduate school, I left to see the world of Brazil. After spending some more time discovering myself, I ended up working for the Commonwealth of Pennsylvania for 32 years as an Air Quality Engineer in the Department of Environmental Protection. I retired in 2007 and took up faceting gemstones again after a long hiatus that reached back to my twenties. I had started cutting cabochons when I was 13 and bought my first faceting machine when I was 15, but ran out of money and time until I retired. My great love in gemology is tourmaline and the collection presented here represents my effort to get as much beauty and variety in the colors of tourmaline as I can. I was particularly lucky in being able to get unheated cuprian tourmaline before copper was discovered in gem grade tourmaline from Mozambique.
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