What is the difference between rusty yellow and peach pink? Dichroism.

A fine oval of dichroic rust and yellow. This oval has a deep pavilion and a shallower crown. It mixes rust and yellow to make peach pink at a distance and is eye clean with excellent crystal. A great flashy gemstone that weighs 2.73 carats.

This is a great oval and I am glad that I put the extra effort into a “supper nova” pavilion that makes  a deep pavilion.  It has a three step crown that is relatively shallow in this stone.  This adds up to having a rather light pastel toned stone, being very open and loaded with color.  Now when I first  glanced at it in its box, I thought it was an peach pink, which is a rather common arrangement out of Africa, but then I read the box and it said rusty yellow.  So I looked closer and realized that the color in this gemstone is not distributed evenly and the stone is actually dichroic.  It is a little hard to see face up because of the excellent mixing of the cut, but when I turned it over, I can see that the ovals ends are redder than the yellow middle of the oval.

So now we have a very personal tourmaline again.  From a distance, for the public, it can pretend to be peach pink, but you know its secret.  Up close and persoal, it is a delightful mixture of rust and  yellow.  It shows offthe colors in a deep cut that is at least eye clean and with great crystal.  It weighs 2.73 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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