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.
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.
