Rendered in our 3D Gemstone Simulator from the DG-Miliano model, 1.00 ct, studio light.
DG-Miliano Ruby
DG-Miliano puts eight stars, eight crown mains and sixteen upper girdle facets round the table, over a girdle of ninety-six facets, and cuts its pavilion in three tiers of sixteen, steepest at the girdle. Our model has 177 facets, a pavilion that measures 38.3° and a depth of 60.3%.
In ruby it trades a few points of light for two real gains: the finest sparkle of the rounds we measure, level with DG-Vitruvio, and the best tilt score among the bright rounds. Against the same cut in diamond it loses on fire, light and leakage, which is the material speaking.
Compared with the T73 Round Brilliant in ruby and with the DG-Miliano in diamond.
A difference counts from 3 points (Brilliance, Fire, Tilt, Leakage), 5 (Scintillation,
Symmetry), 2 (Spread) 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.
All eight scores against the T73
At a glance: the DG-Miliano in ruby (white) against the T73 Round Brilliant in ruby (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 ruby: ahead on 4, level on 1, behind on 3.
Global80, the comparison 79, difference +1
Brilliance90, the comparison 94, difference −4
Fire35, the comparison 37, difference −2
Scintillation98, the comparison 80, difference +18
Spread101, the comparison 100, difference +1
Symmetry100, the comparison 100, difference 0
Shape-norm96, the comparison 102, difference −6
Tilt83, the comparison 75, difference +8
Face-up light census, a different measure from the Cut Grading Tool; Spread and Shape-norm above 100 sit on the ring.
Scintillation 98 against 80 for the T73 Round Brilliant in ruby: 18 points higher
Three pavilion tiers and a ninety-six-facet girdle split the stone into 177 facets, and our scintillation score rises with that subdivision. Nothing round on our ruby pages beats it, and only DG-Vitruvio ties it.
Scintillation follows the number of facets: more facets, more and smaller flashes as the stone moves. Count the facets in each crown. Drawn from each cut's own model.
Tilt 83 against 75 for the T73 Round Brilliant in ruby: 8 points higher
Tilted by 20°, DG-Miliano still returns 83 of its face-up light; the T73 keeps 75. Its brilliance sits within a few points of the T73's, so this is a genuine gain rather than a dim stone holding on to little.
DG-Miliano in ruby · Tilt 83
0° · 13% leak
10° · 16% leak
20° · 26% leak
30° · 26% leak
T73 Round Brilliant in ruby · Tilt 75
0° · 1% leak
10° · 10% leak
20° · 29% leak
30° · 30% leak
Tilt is how much of its own face-up light a stone keeps when tilted. Each frame is the Light Return map with the stone tilted away from you by the angle shown; grey is light leaving through the pavilion. The share under each frame is that picture's own.
Fire 35 against 82 for the DG-Miliano in diamond: 47 points lower
Corundum disperses at 0.018, diamond at 0.044. Put through the same design, the diamond scores 82 for fire and the ruby 35: a ruby round of any plan gives few spectral flashes.
DG-Miliano in ruby · Fire 35
DG-Miliano in diamond · Fire 82
Look at the coloured flashes: those are fire. Same light, same size, same face-up angle; rendered by our 3D Gemstone Simulator from each cut's own model.
What helps: Three pavilion tiers cannot make corundum disperse; a red stone that should flash colour wants the Oval Cut Ruby, at 74.
Leakage 10 against 3 for the DG-Miliano in diamond: 7 points higher
10% of the light escapes through the pavilion in ruby, against 3% in diamond. Ruby's larger critical angle, 34.6° against 24.4°, lets through light that the diamond version reflects.
DG-Miliano in ruby · Leakage 10
0° · 13% leak
10° · 16% leak
20° · 26% leak
30° · 26% leak
DG-Miliano in diamond · Leakage 3
0° · 1% leak
10° · 4% leak
20° · 7% leak
30° · 16% leak
Each frame is the Light Return map with the stone tilted away from you by the angle shown; grey is light leaving through the pavilion. The share under each frame is that picture's own.
What helps: A smaller DG-Miliano leaks the same share as a larger one. The single-angle DG-M5 Ruby lets out 0% in ruby.
Brilliance 90 against 95 for the DG-Miliano in diamond: 5 points lower
Brilliance 90 against 95. The tiered pavilion was drawn for a stone that bends light far more strongly than corundum, and its shallow lower tiers give ruby slightly less to work with.
DG-Miliano in ruby · Brilliance 90
DG-Miliano in diamond · Brilliance 95
Red, green and blue = light returning to the eye; grey = light leaving through the pavilion. This is the head-on view; the Brilliance score averages a wider cone of light, so the score can differ from what one picture shows.
What helps: If face-up light comes first, DG-M5 Ruby tops our ruby census at 100, with coarser sparkle.
DG-Miliano suits a round ruby that will move, in earrings or a pendant, where holding light at an angle counts and a busy, fine sparkle is welcome. It gives up four points of brilliance to the T73 for that.
For maximum light face-up, DG-M5 Ruby. DG-Vitruvio pairs the same fine sparkle with the T73's light: see DG-Vitruvio Ruby.
Ruby's hardness of 9 helps a thin, finely faceted girdle keep its edges in daily wear.
DG-Miliano Ruby: questions
Does DG-Miliano make a ruby sparkle?
Very finely: Scintillation 98, the joint top of our ruby rounds, where the T73 scores 80.
Is DG-Miliano as bright as DG-M5 in ruby?
Not quite. DG-M5 returns 100 and leaks 0%; DG-Miliano returns 90 and leaks 10%, but keeps more light when tipped, 83 against 76.
How heavy is a 6.5 mm DG-Miliano ruby?
About 1.17 ct in ruby, much as a T73 of that width; the diamond version of the outline is 1.03 ct.
Get the DG-Miliano Cut files
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DG-Miliano Cut 3D files
The DG-Miliano Cut as exact geometry: 177 planar facets, real-world scale, ready for CAD,
rendering, printing and casting.
