The droplets of color demand this green with golden wash, cuprian round.#165

A medium dark green with touch of gold, cuprian, droplet of color.  #165 This standard round brilliant has a rich medium dark slightly golden color. It appears to be eye clean and has fine crystal. It is also cuprian and in great demand by the droplets of color. It weighs 1.07 carats.

This standard round brilliant is a nice, eye clean, gemstone with a flashy, medium dark tone green, that is a bit on the yellow side.  I found out that this round was cuprian because I tested it with my spectrometer.  And it is interesting to me that this shade of green color could be cuprian and therefor from Mozambique, but to make a big deal about it like the droplets of color are doing is unnecessary.  The droplet of color weighs 1.07 carats.

My feeling about cuprian tourmaline goes something like this.  If the stone has a bright neon look or an exceptional shade of color, that is rare or maybe not even in existence, without copper, than cuprian tourmaline deserves a premium.  If the gemstone just looks like an ordinary gemstone, then the copper content really doesn’t mean much.

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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