|Triaga - Copyright by Jack Rowland 9/94|
|Difficulty level- Easy|
|Angles for R.I. = 1.54||49 facets + 12 facets on girdle = 61|
|3-fold, mirror-image symmetry||96 index|
|L/W = 1.031 T/W = 0.496 T/L = 0.481||P/W = 0.435 C/W = 0.154|
|H/W = (P+C)/W+0.02 = 0.609||P/H = 0.714 C/H = 0.253|
|Vol./W^3 = 0.200|
|1||45.00||14-18-46-50-78-82||Cut to center point|
|2||42.00||08-24-40-56-72-88||Cut to center point|
|3||41.50||10-22-42-54-74-86||Cut to 1-2-girdle meet|
|4||43.75||16-48-80||Adjust angle to meet at girdle/center|
|1||42.00||14-18-46-50-78-82||Leave some girdle|
|3||38.00||16-48-80||Cut to 1-girdle meet|
|4||31.90||07-25-39-57-71-89||Adjust angle to meet 1-2-3 and girdle|
|5||18.00||07-25-39-57-71-89||Cut to 1-2-3-4 meet|
|T||00.00||Table||Cut to 3-5 meet|
Triaga was first published in the Garnet Gazette in November 1994. It was inspired by Tribble & The Trouble with Tribbles. I am a minimalist and was looking for a gem that had the brilliance & action of Tribble, but was a lot easier to cut and had fewer facets. I think I succeeded very nicely with TRIAGA. I proof cut it with a 3 carat Russian Hydo-Thermal emerald. It dissapeared from my stock so quickly I never even got a picture of it.
Steps 1 & 2 of the pavilion are cut to a common center point. The girdle outline is then easily established by cutting the girdle facets at the same index settings as steps 1 and 2. Step 3 is cut to the girdle meet points. Step 4 may need a slight bit of angle adjustment to get it to meet both at the center and the girdle. If you are forced to choose, make the meet at the girdle a good one. For some reason of optics a slight miss at the bottom of the culet doesn't show through the table. Many of the larger diamonds actually have a flat facet cut at the bottom and it isn't very noticable!
The crown is done by cutting the break facets 1 and 2 to level the girdle. Step 3 is cut just to the girdle meet point. Step 4 will require a slight angle adjustment to get the meets to come in at both ends. If you can't make both meets make the 1-2-3 meet and undercut the girdle meet. Overcutting the #4 facets into the girdle will really hurt the look of the gem. Step 5 is cut at the same index settings as #4 to the 1-2-3-4 meet. Take your time here as this meet is an important one for the looks of the gem, and is a very busy intersection! The table is easy to do. You only have 3 meet points to make, so it isn't very difficult as far as tables go.
Have fun with this one. It will turn heads and is easy to cut.
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© Bob's Rock Shop Bob Keller