Yet Another Ametrine

25. September 2018 21:57

This 7.44 carat, 11.5 mm. gem is the last of my ametrine parcel purchased from Steve Ulatowski / New Era Gems last February in Tucson.

It was another experiment to see if the gold / purple color break could show up and still have a stone that sparkles and glows.  

The camera shows the color variation better than it appears to the eye.

Just for Fun

23. September 2018 21:59

This stone was as much for fun as for anything else. It is a 8.47 carat prasiolite, 13.2 mm.in diameter. The pavilion had a row of narrow concave facets splitting the normal culet row facets. Then the crown was rounded up to the table instead of using rows of flat facets. Finally a number of concave facets were added to the crown.

The cameral once again sees things the do not quite match what I see. The pattern in the center is not something that I "see". and the light and dark pattern is much more subtle.

Another Ametrine

21. September 2018 22:00

Here is a 5.97 carat ametrine which measures 10.4 mm. across. In an experiment to see if the two colors would show rather than mix, I tried using concave facets on two sides of the pavilion to make it really bright, and using steep angles on the other two sides (similar to a method used for closed C axis tourmalines.)

It seemed to work somewhat. As usual, the camera showed the difference more than it seemed to me. And also added a bit an impressionist painting look to the stone.

Hexagon prasiolite

20. September 2018 22:03

Pictured here is a new 5.44 carat, 11.0 mm. prasiolite. As mentioned previously, I find the hexagon cuts attractive. Here the light and dark patterns from the concave facets used on the pavilion of the stone are much more obvious to the camera than to my eyes. The result reminds me of an iris flower (another favorite of which I have too little in my garden.)

Uruguay Citrine

10. September 2018 22:05

Another item that was obtained during 2018 Tucson, this 5.26 carat dark orange citrine is material from Uruguay. The pavilion features a row of concave facets to give it an extra glow. The stone is 9.8 mm wide. And how did that piece of lint get by during the photo session?

Ametrine

9. September 2018 22:08


Pictured here is a 4.64 carat ametrine that is 10.3 mm wide and has concave facets on the pavilion side.

The rough material for this stone is Bolivian origin obtained from New Era / Steve Ulatowski during the Tucson Gem shows last February. Before it was cut, it was easy to see that the amethyst / purple was isolated on less than half of the stone, but now the colors reflect and mix.

Mali Garnet

31. August 2018 22:11

Pictured here is a 1.61 carat Mali Garnet that is 6.7 mm. in diameter. The color is a dark orange, almost brown. This might be the perfect in a ring for the January birthday man who wants something other than a traditional red garnet.

August Birthstone

31. August 2018 22:09

Since it is the August birthstone, it is appropriate to end the month with another peridot. This gem weighs 2.40 carats and is 8.5 mm. in diameter and is a nice granny smith apple green. The rough material for this stone originated in Pakistan and was obtained from John E' Garsow.

Hexagon in Citrine

28. August 2018 22:12

Another hexagon, this time a bright orange citrine cut from Brazilian rough obtained at the February Tucson shows. (This photo looks too yellow on my current monitor.) It is 9.8 mm. across and is 4.36 carats and is very bright from the row of concave facets on the pavilion.

Hexagon Prasiolite

27. August 2018 22:13

Prasiolite is a green variety of quartz. The one pictured here is 6.09 carats and is 11.5 mm across. The pavilion of the stone has been cut with concave facets in addition to traditional flat facets. An inclusion in the rough material forced a change in the plan for how the crown was to be cut -- and the result was an accidental winner.

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