Green c axis and golden brown a/b axis emerald cut

Smaller emerald cut with green c axis and yellowish brown a/b axis This emerald cut is strongly dichroic. Its ends are green and the dominant a/b axis color is a darker bronzed brown. It has good crystal and appears to be eye clean. It weighs 1.24 carats.

This smaller emerald cut tourmaline has a distribution of color that I think is unique to tourmaline.  Its c axis is very nice mid toned yellowish green and the a/b axis is a golden brown.  In this emerald cut the green is in the ends and only really impacts the stone in the ends,  The rest of the gemstone is more of a darker browned bronze under yellowish light.  The sum total of the different dichroic color is a tourmaline that is more interesting than eye candy.

Later in the day I revisited this gemstone to compare it with a different tourmaline.  And low and behold the green had become much more important in coloring this gemstone.  Then even later, a more golden brown green was dominant.  This is just another example of needing to see a tourmaline under different natural and artificial lights before deciding if you really likes its color.

The smaller emerald cut appears to be eye clean.   Its crystal is good and its weighs 1.24 carats.  I got the rough from someone who stated that it came from India and had chrome content.  I was not able to confirm the chrome content with my spectrometer.


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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