A yellow with a wash of green, cuprian round.#182

A mostly yellow with a wash of green, cuprian round.  #182 This larger round has some tiny inclusions, but still good crystal and brightness. It has mostly a yellow color with a wash of green that does not seem to get brighter from its copper content. It weighs 5.64 carats.

This is another gemstone that I did not buy as a cuprian tourmaline.  I discovered it with my spectrometer.  It has just the faintest inclusions that don’t effect the beauty of the stone at all.  But then again, I don’t see any exceptionally bright neon look in this gemstone from its copper content.  I wish that I could actually get the concentration of copper in more  of my cuprian gemstones, to see how it varies with color and the stones spectral absorption peaks.  This yellow with a wash of green, standard round brilliant has good crystal and a nice bright open personality.  It weighs 5.64 carats which makes it a significant gemstone in the collection.

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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