A hot one in the hole, slightly included pink round.#27

Hot pink slightly included round.  #27 This standard round brilliant is a hot pink that is only slightly included. It has good crystal and weighs 2.10 carats.

I am sure that it takes a variety of factors (known and unknown) to make a great hot pink round.  I can do my  best, but some pinks are hot and some are not.  This is one of those hot ones.  This standard round brilliant has a little scatter toward the girdle, that is irrelevant to its beauty, but I don’t think that cleanliness is a significant factor in hotness.  I also know that manganese +3 can be solely responsible for red in some tourmaline and I hope to use my spectrometer and other testing to see what is hidden in the tourmaline that might go beyond just being red.  I have read  about and seen indications of absorption of visible light, right at the boundary of the infrared.  It could either be copper or manganese +3, but the real question I have is why Mn+3 sometimes produces this increased absorption of light and at other times it does not.  I don’t have an answer, but I have seen a relationship between the perceived brightness of a hot pink tourmaline and the absorption at the far red end of the spectrum by probably Mn+3, in the collection.  I am working to get a better view of the complete spectrum for those hot tourmaline that show the increased absorption.  The posted stone weighs 2.10 carats.

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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