Announcing an Emerald cut of note, Pure Sea Foam.

 

Top quality sea foam from Afghanistan, emerald cut This top quality sea foam tourmaline is a GEM. It has all the right attributes including a nice size of 2.36 carats.

Emerald cuts are very useful for the cutting of tourmaline.  This is due, at times, to their dichroism. or crystal shape or desire to keep colors from interacting too much in a gemstone.  It is also a cut that is abused terribly in an attempt to retain too much weight in a gemstone.  The depth of the cut can also be adjusted to try and lighten or darken a gemstone’s tone level.  By the time you add a polish that is only commercially in quality, you probably have a colorful piece of optically dead tourmaline.

Now that I have that out of my system for the moment, the object of this post is ready to be introduced.  She is an outstanding piece of top quality sea foam from Afghanistan.   She came with a number of others that you will meet in a once in a lifetime deal.  Her color is enough to enthrall, but the excellent polish on her well proportioned body, takes her over the top.  The only regret that I have with this gemstone is that the rough’s dimensions and crystal shape demand that I use an emerald cut (that limits the mixing of dichroic colors) to get the best yield.  In this case the stone’s longer axis emerald cut limits the c axis yellow green color to the relatively smaller ends of the stone, but does a great job of presenting the bluer a/b color that fills most of the stone.  I would have preferred more mixing, but the imperative to retain as much as you can with such expensive material wins over mixing the colors.  She weighs an attractive 2.36 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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