Ametrine


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

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

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

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

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.

Citrine octagon

Pictured here is the last of the gems started as a faceting demonstration at the Orcutt show. It is a nice orange, octagonal shaped 3.67 carat citrine that is 9.5 mm across. The rough material is from Brazil, among the items purchased during last February's Tucson adventures.

Finishing up Demonstration Stones

During the weekend of the Orcutt show, I got a start on a batch of amethysts and citrines from the faceting demonstration. Of course, that meant that last week, I had that batch to finish up.

Shown here is the first one started at the show. It is a 2.86 carat amethyst which is 9.0 mm. in diameter. This one also got a little extra in the way of concave facets on the pavilion after the show since only the flat facet equipment was used for the demonstration.

Ametrine

This 5.47 carat ametrine is half the purple amethyst color and half the orange citrine color, but it all gets mixed up in this sort of cut. The camera does a better job of "seeing" the two colors than my eye in most cases.

To see this for yourself, come by the Orcutt Mineral Society show this weekend being held Friday through Sunday at the Nipomo High School. It will be on display by the faceting demonstration along with a selection of other faceted gems.

Faceting Demonstration at OMS Show

I will be demonstrating faceting during the Orcutt Mineral Society Show next weekend.

The event will take place at the Nipomo High School from Friday, August 3rd through Sunday, August 5th. Free admission and parking.

In addition to the demonstration, I will have on display an assortment of gemstones faceted from natural materials and available for purchase.

If you are in the SLO area, do come by the show.

 

Opposed bar Morganite

Another type of cut I find appealing is the "opposed bar" cut where instead of having top and bottom facets aligned in parallel, they are at 90 degrees from each other. Unfortunately, I have yet to figure out how to photograph that sort of stone so that it shows as well as it should.


Pictured here is a 2.83 carat Morganite (pink beryl) opposed bar cut from Nigerian rough obtained last February in Tucson from John E' Garsow.