Really Nice Green Round#1015

 

Great middle of the road green. This standard brilliant round weighs 3.22 carats. It does not show dichroism and is a fine uniform green that is eye clean or better.

I know that I shouldn’t bias my love of a color on cut, but with green I truly long for nice ones that are not emerald cuts.  There are several reasons for cutting green tourmaline rough into emerald cuts.

1,  The crystals tend to have a large ratio between their width and length.

2,  Many crystals have closed ends, optically dense c axis.

3,  The suppliers prepare the rough by clipping off the terminus (at least it was traditional in Africa) and then clip the crystals into lengths that maximize the size of the pieces of rough, which usually precludes the efficient cutting of rounds.

I have had the best luck in cutting greens that are not emerald cuts with highly worn alluvial material.  The heavily frosted pebbles usually have a cross section that can be made into rounds or at least ovals.  I usually try and get a round first, but if the pebble is too flattened, I produce an oval.  I  adjust the oval’s ratio to make the most of the pebble’s thickness and the widest part of its girth.  I really have not found too many alluvial pebbles with closed ends from my suppliers.

The gemstone that started all this and that I just looked at under a yellowish light is a great plain Jane.  (yellowish light always helps greens look great) It has a great medium tone, medium hue, medium saturation and is clean without any indications of dichroism.  It is too large at 3.22 carats to be a droplet of color, but its heart lies there.  I will have to check, but I don’t think that I have one as nice that is droplet ready.  That would be a disappointment.

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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