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Here is another good one. This standard round brilliant is dark enough to have its color mainly flash driven under average lighting conditions. I have a yellowish light and a diffused midday light to work with. And this stone’s flash is jumping from a yellowish olive green under the yellow light to a greenish blue under the midday light. That is quite a color slide that I never got to home base with before. I don’t see dichroism in the stone, but I bet it was oriented with the c axis perpendicular to the table. It appears to be eye clean and weighs 1.99 carats. It likes all the attention and I will have to look at this gemstone under some different light sources (2013).
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.
