Brilliance 96 · Fire 62 · Scintillation 80 · in our census, where the T73 scores 95 · 54 · 80 in almandine
How the DG-Anteros handles light in almandine, measured: brilliance 96, fire 62 and 3% leakage, set against the T73 in the same stone and against the same cut in diamond.
Almandine has a refractive index of 1.750 to 1.830 and a dispersion of 0.027. Its critical angle, from the low end of that range, is 34.8°, so a round design needs a pavilion of at least 36.3° for head-on light to reflect off both sides of the pavilion and leave through the table. We trace it with one index, 1.790, the midpoint of the published range, and a fire spread of 0.023, 0.86 of the published dispersion. Every picture here is our Light Return tracer at 1.750, and every figure is from the same light census that scores the other gemstones; the 3D Gemstone Simulator shows the DG-Anteros in almandine live.
The DG-Anteros has 73 facets, a table of 53.5% of its width and a total depth of 59.4% of its width; its pavilion mains sit at 40.1°. In almandine, the census returns 96 of 100 for brilliance and 62 for fire, against 95 and 54 for the T73, our benchmark, in the same stone; the same DG-Anteros in diamond reads 95 and 74.
No figure ahead by our thresholds
Compared with the T73 Round Brilliant in almandine and with the DG-Anteros in diamond. A difference counts from 3 points (Brilliance, Fire, Tilt, Leakage), 5 (Scintillation, Symmetry), 4% (face-up size per carat) or 5% (weight); Tilt counts as a pro only for a stone within 5 points of the brilliance it is compared with. How we measure.
At a glance: the DG-Anteros in almandine (white) against the T73 Round Brilliant in almandine (dashed): solid white where it reaches further, hatched where it falls short. Each pro and con is explained, with pictures, below.
Against the T73 Round Brilliant in almandine: ahead on 6, level on 2.
Against the T73 in almandine and the same cut in diamond, no figure of the DG-Anteros is ahead by the thresholds above. Its figures are in the wheel and the FAQ; Almandine ranks every cut we score in almandine.
1.14 ct at 6.5 mm, against 0.97 ct for the same cut in diamond (+17%)
Weight follows specific gravity: 4.125 for almandine against 3.52 for diamond, so the same model at the same size weighs 1.14 ct here and 0.97 ct in diamond, 6.5 mm across. Nothing about the light changes with it.
Try it yourself: Weights in every gemstone on the DG-Anteros page
Fire 62 against 74 for the DG-Anteros in diamond: 12 points lower
Fire is the share of the returned light that splits into color at the exit facet: the census traces each exit again at the refractive index minus and plus the fire spread (0.023 in almandine) and counts a ray as fire when the two directions differ by more than 0.6°. The DG-Anteros reads 62 against 74 for the same cut in diamond. The figure is the census's; the 3D Gemstone Simulator renders almandine's fire live.
The fire figure is the census's, traced at the refractive index minus and plus the fire spread. See the fire in the 3D Gemstone Simulator: the DG-Anteros in almandine under the sunny-day lighting.
What helps: the DG-Elongated Hexagon reads 88 for fire in almandine, the best of the cuts we score there.
Tilt 79 against 85 for the DG-Anteros in diamond: 6 points lower
Tilt is how much of its face-up brilliance a stone keeps when the census tilts it 20° about its long axis, with 2,200 rays. The DG-Anteros keeps 79 against 85 for the same cut in diamond. The tilt strips below show the maps at 0°, 10°, 20° and 30°, with each picture's own leak share under it.
DG-Anteros in almandine · Tilt 79
DG-Anteros in diamond · Tilt 85
What helps: the DG-Miliano reads 84 for tilt in almandine, the best of the cuts we score there.
Try it yourself: Compare the Tilt spoke in the Cut Performance Wheel
Against the T73 in almandine and the same cut in diamond, no figure of the DG-Anteros is ahead by our thresholds. The catch: it weighs more than in diamond, shows less fire than in diamond and loses more light when tilted than in diamond.
If that catch matters more to you, the DG-Elongated Hexagon reads 88 for fire in almandine, the best of the cuts we score there.
Every figure on this page is from our light census, traced at one refractive index: a simulation of the geometry, not a grading report. The 3D files and cutting files below are the same DG-Anteros model we traced.
In our census the DG-Anteros returns 96 of 100 for brilliance and 62 for fire in almandine, against 95 and 54 for the T73 in the same stone. Against that round and against the same cut in diamond it has 0 pros and 3 cons by our thresholds; the summary above names them.
At least 36.3° for a round design: almandine's critical angle is 34.8°, from the low end of its refractive index range, and head-on light has to reflect off both sides of the pavilion and leave through the table. The DG-Anteros's pavilion mains sit at 40.1°.
At 6.5 mm across, 1.14 ct in almandine, against 0.97 ct for the same cut in diamond (+17%): almandine's specific gravity is 4.125, diamond's 3.52.
Yes: the 3D Gemstone Simulator renders it live, with almandine's own refractive index and dispersion. Almandine is traced by the same light census as the other gemstones, with its refractive index and fire spread derived from published values, so its scores are on the same scale; the pictures here are our Light Return tracer, and the Cut Performance Wheel sets it against any other cut and stone.
The DG-Anteros Cut as exact geometry: 73 planar facets, real-world scale, ready for CAD, rendering, printing and casting.
The DG-Anteros Cut as a faceting design: 57 + 16 girdles = 73 facets, 96 index, 8-fold mirror-image symmetry, ready for the machine.
Not sure the files open in your software? Get the cube free: the same six formats, for your email address, used only to send them (privacy).
Questions before you buy? Email us.
Almandine: optical properties and the top ten cuts · The DG-Anteros: specifications, model and files