Possibly heat colorless oval

Possibly heated colorless oval. This eye clean colorless oval was possibly heat treated. It is bright and weighs 3.16 carats.

This colorless oval could have possibly been heat treated since it went threw  Thailand from where ever it was mined.  The principle reason I purchased the rough was to see if heating effect it, in a way that I could tell.  I wasn’t able to see any difference in the four pieces I bought, from run of the mill unheated tourmaline.

This oval is eye clean and completely colorless.  It weighs 3.16 carats.  I have some identically colorless tourmaline that I  feel sure was not heated.  The inability to determine heating or not, makes the heating question of little consequence.

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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