Great, cuprian, eye clean, yellow round.

Eye clean, bright, medium light pastel, with copper, round This is an attractive standard round brilliant. It yellow is an eye clean pastel without green which is good, but what makes it great is that it has copper. Interesting! It weighs 2.67 carats.

This standard round brilliant is a great gemstone.  It is eye clean and has a medium light pastel yellow that is reasonably stable in any white light.  No greenish yellow here, but it can not compare with the sharp saturated yellow gems like #629.  So this is a nice, bright, flashy, medium toned yellow, but what makes it great.  It has copper in it and that makes it unique in the collection.  Now I have no way of knowing if copper actually influences the color of the round, but just the idea that my spectrometer found the copper in a gemstones is nice. (The GIA’s article on paraiba type tourmaline from Mozambique includes a yellow.)  It weighs 2.67 interesting 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.
This entry was posted in Cuprian Tourmaline, Etc., Yellow and tagged , . Bookmark the permalink.

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.