Yellow washed in green, cuprian oval. #71

Very bright yellow with a wash of green, cuprian, oval.  #71 This oval appears to be eye clean and very bright. I found out that it has copper with my spectrometer. Its color is mostly yellow with a wash of green. It weighs 3.49 carats.

This apparently eye clean and very bright oval is mostly yellow with a wash of green.  I discovered, with my spectrometer, that it contains copper as a chromophore and that is interesting.  But I don’t know how much difference it makes in the color of the gemstone.  Besides any color influence it might have,  copper might also help make the gemstone bright, but I don’t get the eye candy feeling with this more reserved oval.   There are no problems with its quality of crystal like there is with many cuprian gemstones.  The gemstone weighs 3.49 carats.


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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