Exceptional Rubellite Unique to the Collection Round.#1162

A cherry red, deeply cut, round, GEM This cherry red round is a bicolor with a colorless crown and a red pavilion. It is a GEM, exceptional gemstone. It pavilion is cut with horizontally cut mains and the crown is deep. It weighs 6.60 carts.

Deeply cut bicolor, colorless crown, red pavilion, 6.60 carats.

Long ratio bright red emerald cut.  #580 I like this gemstone. The long ratio emerald cut is filled with a vibrant red from only the ends of the gemstone. This is quite exceptional and a good indication of the high quality of the gemstones eye clean crystal. It weighs 4.51 carats. (Some would say it was mostly rich pink, but I feel the dichroic red ends give the whole gem a red soul.)

Nice longer ratio emerald cut with bright red c axis, 4.51 carats

This is a GEM, an exceptional gemstone.  It has everything including a secret.  But first a question.  How do you get a cherry red tourmaline that is a reasonable size without its tone value being dark or even too dark?  Well you need to get an exceptional piece of rough and cut it the right way.  That is being too general of course and there really are two ways to climb to the peak of the red mountain.  Fortunately I have examples of both types in the collection, but I should not exclude reds that are pure and just need the proper sized for their tone level.  But these gems tend to be dark in the larger sizes.

Now for the two ways to get a really nice cherry red rubellite:

1,  Find a short stocky bicolor with red and clear sections and cut a round with the clear half in the crown and the red half in the pavilion.  It doesn’t have to a round of course and the red doesn’t necessary have to be in the pavilion, but it certainly is easier to cut for me.

2,  Find a dichroic red with a pale a/b axis and a rich red c axis.  Then cut a nice emerald cut that does not have too long a ratio, so the red in the ends fills the whole emerald cut without getting too washed out in the middle.

The posted stone that is round is the first type of cherry red gemstone.  It has a deep pavilion from being cut with a split main pavilion.  The crown is exceptional deep in order to maximize the effect of having a colorless crown and a red culet.  The red part of the gemstone maybe just extends half way up toward the girdle.  It weighs a great medium toned, cherry red, 6.60 carats.

I am including my best dichroic red emerald cut as a second picture.  It has a pretty long ratio and I am surprised that the red ends dominated the emerald cut so completely.

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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