Best7rp insert

Many faceters don’t keep a book on their actual yields, and wind up quoting insanely hopeful stories to potential customers. I recommend keeping a careful record of what you cut, and how you yield. Staying in touch with reality – and helping to improve performance are both very useful in my opinion.

Most of the windowing fat-bellied stones we see, the pavilion is roughly a hemisphere. That’s the bulges [sic] someone is referring to removing without losing a carat. Modern brilliant-style pavilions with “straightened out” facets are roughly cones.

Best Hermes baginsert

I selected a 9-main Round Brilliant with un-stacked Mains – to work with the depth restriction while creating max scintillation and saturation retention. Check out this video:

The volume of the cone will be ONE HALF the volume of the hemisphere, provided there’s sufficient depth to support proper angles without reducing the gem’s width – a luxury we usually don’t have. So, the yield is often less than 50% – a fact many customers find shocking.

DGAZ BagInsert

The color is actually a great deal better than I could capture here – with a very saturated electric orangy-pink. The re-cutting also removed two included crystals and most of a veil that was originally toward the thin end.

This stone was originally 3.5 mm deep, and we re-cut it to 3.2 Original was 8 x 6.3 x 3.5 at 1.7 carats weight. As is typical with very shallow stones, the re-cutting lost a great deal of weight. Finished dimensions are 5.25 mm diameter, 3.2 deep, and 0.52 carats.

This stone was originally 3.5 mm deep, and we re-cut it to 3.2 mm deep, centering on the deepest portion, and losing only 0.3 mm in the process (keep reading to find out the yield). gem looks like this in profile:

7RPinserts discount Code

Faceting News Faceting News Subscribe to the Newsletter Name * Email * CAPTCHA If you are human, leave this field blank. SUBSCRIBE

Given that many native-cut stones are grossly lopsided, as well as too shallow to support their existing width with proper angles, a great deal more than 50% would be lost re-cutting many of them. Here’s a roughly profile-angle photo of the Sapphire.

7RPKellyinsert

This is a natural Sapphire recut of a native gem that was pretty bad in terms of geometry and color presentation. There was a chip at the girdle, lopsided geometry (check where that culet is), bad meets, bad polish, and abraded facet junctions from the typical mishandling often found with native stones:

I just received another e-mail from someone asking about re-cutting a native-cut stone. Someone apparently offered to re-cut the stone, and: