DG-Anteros Ruby: Pros, Cons & Brilliance

DG-Anteros keeps the T73's 73 facets and its plan, with a 53.5% table, an eased 33.0° crown and a 40.1° pavilion. We designed those angles for moissanite, which bends light far more strongly than ruby does.

In ruby, with a critical angle of 34.6°, it still comes out three points brighter than the T73 and leaks less: 3% against 5%. DG-M5 beats it on light; nothing else round in our ruby census does. Against the same cut in diamond, ruby gives up fire and some tilt stability, as it does in every round.

The crisp arrows and hearts the design was drawn to show belong to moissanite. We have not traced that pattern in ruby and make no claim for it here.

Is DG-Anteros worth it for a ruby? Pros and cons

Pros

A little more light than the T73 in ruby 97 vs 94

Cons

Far less fire than in diamond 43 vs 74
Heavier than the diamond version 1.10 vs 0.97 ct
Loses more light when rocked than the diamond 78 vs 85

Compared with the T73 Round Brilliant in ruby and with the DG-Anteros 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-Anteros 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 6, level on 2.

Global82, the comparison 79, difference +3
Brilliance97, the comparison 94, difference +3
Fire43, the comparison 37, difference +6
Scintillation80, the comparison 80, difference 0
Spread101, the comparison 100, difference +1
Symmetry100, the comparison 100, difference 0
Shape-norm104, the comparison 102, difference +2
Tilt78, the comparison 75, difference +3

Face-up light census, a different measure from the Cut Grading Tool; Spread and Shape-norm above 100 sit on the ring.

Open it in the Cut Performance Wheel

What ruby gains in DG-Anteros

A little more light than the T73 in ruby

Brilliance 97 against 94 for the T73 Round Brilliant in ruby: 3 points higher

The eased crown and shifted pavilion cone send slightly more of the table's light back up in corundum than the 1919 angles do. Three points is a modest gain, and what it buys is a livelier red face.

Dg-anteros in ruby face-up Light Return map: red, green and blue show where the light returns from, grey shows where it leaks (Brilliance 97) — 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.

T73 round brilliant in ruby face-up Light Return map: red, green and blue show where the light returns from, grey shows where it leaks (Brilliance 94) — 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.

Try it yourself: Open this Light Return map in the simulator

Where DG-Anteros falls short in ruby

Far less fire than in diamond

Fire 43 against 74 for the DG-Anteros in diamond: 31 points lower

Fire 43 in ruby, 74 in diamond. It is still the most fire of the bright rounds on our ruby pages, a few points over the T73's 37, but corundum's dispersion caps what any of them can show.

Dg-anteros in ruby face-up under a single bright light: a render from our simulator, its coloured flashes are the fire (score 43) — 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.

Dg-anteros in diamond face-up under a single bright light: a render from our simulator, its coloured flashes are the fire (score 74) — 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: Re-solving the angles moved light, not dispersion; for colour flashes in a ruby, the Oval Cut Ruby reaches 74.

Try it yourself: See the fire in the 3D Gemstone Simulator

Heavier than the diamond version

1.10 ct at 6.5 mm, against 0.97 ct for the same cut in diamond (+14%)

1.10 ct for a 6.5 mm stone in ruby, 0.97 ct in diamond: corundum is the denser of the two by about 14%.

A DG-Anteros 6.5 mm across, weighed from the model's measured volume and each stone's specific gravity.

What helps: Corundum is simply denser; specify a DG-Anteros ruby by width and let the weight follow.

Try it yourself: Weights in all seven gemstones on the DG-Anteros page

Loses more light when rocked than the diamond

Tilt 78 against 85 for the DG-Anteros in diamond: 7 points lower

Tipped 20°, it keeps 78 of its face-up light, against 85 for DG-Anteros in diamond. The gap is the material's wider escape cone rather than a weakness of the plan: the T73 in ruby scores 75.

Dg-anteros in ruby tilted 0 degrees: Light Return map, 1% of the face leaking — 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.

Dg-anteros in ruby tilted 10 degrees: Light Return map, 5% of the face leaking — 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.

What helps: The tiered pavilion of DG-Miliano Ruby keeps 83 at a tilt in ruby, for a few points less light (90).

Try it yourself: Compare the Tilt spoke in the Cut Performance Wheel

Who a DG-Anteros ruby suits

DG-Anteros suits a cutter or buyer who wants the familiar eight-fold T73 plan with a few more points of light than the T73 in ruby. It is the round with the most fire on our ruby pages, though in absolute terms that is not much.

For the most light, DG-M5 Ruby. For the published proportions with a girdle setters know, the T73 Round Brilliant Ruby.

DG-Anteros Ruby: questions

Is DG-Anteros good for ruby?

It is the second-brightest ruby round we measure: Brilliance 97, behind DG-M5's 100 and ahead of the T73's 94, with 3% leakage.

Why measure a moissanite cut in ruby?

The plan is the T73's and only the angles differ, so it shows how much those angles matter in a lower-index stone. In ruby the answer is a few points.

Does DG-Anteros give a ruby more fire?

A touch more than the T73 does, 43 against 37, which makes it the most fiery round on our ruby pages. Cut in diamond, the same design scores 74.

Does the cut change a ruby's colour?

We do not measure colour. Ruby shows purplish red along its optic axis and orangey red across it, so how the rough is oriented matters as much as the facet angles.

Get the DG-Anteros Cut files

6 formatsMillimetresWatertight

DG-Anteros Cut 3D files

The DG-Anteros Cut as exact geometry: 73 planar facets, real-world scale, ready for CAD, rendering, printing and casting.

STEPExact faceted solid for CAD
3DMRhino, closed mesh on its own layer
STLWatertight mesh for printing and casting
OBJMesh for modelling and rendering
FBXBlender, 3ds Max, Maya, Cinema 4D, Unity, Unreal
GLBWeb, AR and quick previews

€9.99 · Personal useBuy the 3D files

GemCad96 index

DG-Anteros Cut cutting files

The DG-Anteros Cut as a faceting design: 57 + 16 girdles = 73 facets, 96 index, 8-fold mirror-image symmetry, ready for the machine.

.ascGemCad design file, 96 index gear
.csvTier table: angles, indices and cutting order
DiagramPrintable faceting diagram

€9.99 · Personal useBuy the cutting files

Questions before you buy? Email us.

More gemstones and cuts

Ruby: optical properties and the top ten cuts · The DG-Anteros: specifications, model and files

DG-Anteros Ruby: a moissanite design that out-returns the T73