Namibian blues a moving flaw in a pure hearted emerald cut.#371

It is always sad to see a beautiful stone destroyed and when it is happening as you work on it, that is even worse.  Now I have certainly had tourmalines “blow up” on me and left me shatter along with themselves, but this stone is one of the few tourmaline’s I have cut that developed a flaw that moved ahead of the cutting, threw the nascent gemstone.  The more I removed the more developed the flaw.  I have found that there is only one reasonable way to try and get a clean stone from this type of rough.  Put on an aggressive lap and with moderate pressure, take down the facet as rapidly as you can.  I have out run a few of the moving flaws this way.  Once they are cut out, you can continue to cut the stone in a normal fashion.  I have not had exceptional problems once the flaw was gone, but it better be completely gone.

Great Namibian Blue Emerald Cut with Flaw that Moved.  #371 This medium dark toned blue Namibian emerald cut developed a flaw while being cut. The flaw is not particularly obnoxious, but the stone is unstable. It has everything else, just great. It weighs 4.11 carats.

This beautiful, medium dark, completely open, blue Namibian emerald cut bears the dark line of a moving fracture.  It penetrates about half way into the heart of the stone and really looks like nothing more than a dark irregular line.  The rest of the stone has great properties and the flaw is not really obnoxious.  But it lays there as a result of the stones instability and I have no idea whether it could be set or not, without completely fracturing the stone.

The gemstone still has a spot in my heart and a place in the collection.  It still makes a nice display stone for the blues of Namibia, that may have come from heating the rough.  It weighs 4.11 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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