A shade of pink purple owned by copper, droplet of color

Included pink with hint of purple droplet of color. This shade of pink purple indicates copper. The standard round brilliant is moderately included and has a medium light tone level. It weighs 1.52 carats. It had no problem getting into the droplets with its rare color.

Color in tourmaline is truly a wonderful trip, but you have to be careful about coming to conclusions about its chemistry based on color alone.  Two areas of major confusion are the coloring of Dravite the species with either chrome or vanadium to make green, (chrome tourmaline is really colored by vanadium) and the color of Elbaite the species with copper and iron (they can produce the same cyan color).  Having said this I am still going to venture out on a limb.

This pink purple standard round brilliant is representative of a family of color that grades from just a touch of purple in pink to purple.  It comes in the faintest tone level to the deepest tone level and always contains copper as a chromophore.  I have technical problems with confirming this with my spectrometer, due to its limited spectral range and an interesting effect of manganese, that is missing three electrons (Mn+3).  It can sometimes have an increased amount of absorption in the infrared.  Based on this less than stellar support, I declare that this moderately include round be admitted to the droplets with the honor of being a rare color of cupian extraction.  It weighs 1.52 carats, has a medium light tone value and good crystal between the scattered inclusions.  It has just a touch of purple.

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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