Achroite round a ghostly gem#903


Achroic a ghostly brew A 5.67 carat standard brilliant round gemstone, that is bright and flawless.

Achroite is an old trade name for colorless tourmaline (Elbaite).  It is from the Greek, like many names, and it is a find name, but one I have had made relatively little use of.  Why you might ask.  Well to find a truly colorless tourmaline that does not have a hint of color that someone can see is pretty difficult.  Now you know that I  try and be difficult with tourmaline color and have even been known to be argumentative (in a nice way), but the book is closed on this one.  Achroite is the best name for this bright well sized (5.67 carat) standard brilliant round, period.  It is the largest gem in the collection that I call Achroite and I don’t think it has been heated.  I don’t think that it has been heated because of the source of the material, the condition of the rough (it did not have it surface ground to help prevent cracking) and just a hint of color that I can see in some white lights).  I do have a few colorless, actually they have more gray in them than this gemstone, that I purchased from Thailand.  I am sure that the Thai material was heated,  just because they don’t let go of good rough.  I know that you can get colorless from pinks and blues and other colors I suspect.  I got the Thai material to see if I could tell that it had been heated,when I cut and polished it.  I could not.  I don’t have anything heated myself.



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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