Another peach to pink mascaraed, sliding color, round.#252

A color slider from peach to pink, sharp round  #252 This standard round brilliant is a nice eye clean stone. It slides from peach to pink depending on the light. It has a fine medium tone and weighs 2.46 carats.

I ran into many more blue to green sliders in the collection than I ever expected, but the variety that is really spooking me is the unstable pink/red to peach/orange.  This is another gemstone that does not agree with the label (peach) on the storage box and my eye  which says that it is a pink under my yellowish light source.  I have seen some of this variety on the inter net which included a few pages from Thailand, but I have read nothing about it.  I do know from the work I did with Laurellite, that the eye/mind has evolved to maintain color consistency.  This means that an orange will stay orange even in the changing light of a full day.  It also means the response of the eye/mind to differences in color intensity can cause color change.

This attractive gemstone has a nice medium pastel look and appears to be eye clean.  It has fine crystal and weighs 2.46 carats. A really nice middle of the road trooper except for the pesky color shifting.


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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