DG-Anteros Amethyst: Pros, Cons & Leakage

DG-Anteros keeps the T73's 73 facets and a 53.5% table, with a 33.0° crown and a 40.1° pavilion re-solved for moissanite. In amethyst that pavilion sits a fraction under the guide minimum of 40.4°, yet the stone leaks only 18% of its light, the second-smallest share we measure in quartz.

Each score counts once on these pages, against whichever baseline it differs from more. For DG-Anteros in amethyst that is the diamond version every time, so its wins over the T73 (Brilliance 82 against 72, Fire 54 against 36) appear here rather than among the pros.

Is DG-Anteros a good cut for amethyst? Pros and cons

Pros

Lighter than the diamond version 0.73 vs 0.97 ct

Cons

Less fire than in diamond 54 vs 74
Keeps less light when tipped 69 vs 85
More light out of the back than in diamond 18 vs 2
Less light than the diamond version 82 vs 95

Compared with the T73 Round Brilliant in amethyst 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 amethyst (white) against the T73 Round Brilliant in amethyst (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 amethyst: ahead on 5, level on 2, behind on 1.

Global76, the comparison 70, difference +6
Brilliance82, the comparison 72, difference +10
Fire54, the comparison 36, difference +18
Scintillation80, the comparison 80, difference 0
Spread101, the comparison 100, difference +1
Symmetry100, the comparison 100, difference 0
Shape-norm88, the comparison 77, difference +11
Tilt69, the comparison 80, difference −11

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 amethyst gains in DG-Anteros

Lighter than the diamond version

0.73 ct at 6.5 mm, against 0.97 ct for the same cut in diamond (−25%)

At the same width amethyst carries about a quarter less weight: 0.73 ct for a 6.5 mm DG-Anteros, against 0.97 ct in diamond.

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

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

Where DG-Anteros trails its diamond version

Less fire than in diamond

Fire 54 against 74 for the DG-Anteros in diamond: 20 points lower

Quartz disperses light weakly, 0.013 to diamond's 0.044. A re-solved crown cannot add colour the material never splits out.

Dg-anteros in amethyst face-up under a single bright light: a render from our simulator, its coloured flashes are the fire (score 54) — 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: The Oval Cut Amethyst gives the most fire we measure in amethyst, 69.

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

Keeps less light when tipped

Tilt 69 against 85 for the DG-Anteros in diamond: 16 points lower

At 20° it holds 69 of its face-up light; the diamond version holds 85. In the diamond's strip the grey grows steadily as the stone tips. Quartz, with its larger critical angle, loses more over the same tilt.

Dg-anteros in amethyst tilted 0 degrees: Light Return map, 20% 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 amethyst tilted 10 degrees: Light Return map, 25% 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 DG-Vitruvio Amethyst keeps 81 when tipped, from less light to begin with (71).

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

More light out of the back than in diamond

Leakage 18 against 2 for the DG-Anteros in diamond: 16 points higher

18% of the light in our census escapes in amethyst against 2% in diamond. It is still among the smallest shares in this stone; only DG-M5 leaks less.

What helps: We have not measured a steeper DG-Anteros, so we cannot say what one would do. DG-M5 Amethyst leaks 15%, the least in this stone; size does not change the share.

Try it yourself: Tilt it yourself in the simulator's light map

Less light than the diamond version

Brilliance 82 against 95 for the DG-Anteros in diamond: 13 points lower

Diamond returns 95 in this cut, amethyst 82, still well clear of the T73's 72 in quartz. The gap to diamond is the material: an index near 1.55 against 2.417.

Dg-anteros in amethyst face-up Light Return map: red, green and blue show where the light returns from, grey shows where it leaks (Brilliance 82) — 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.

Dg-anteros in diamond face-up Light Return map: red, green and blue show where the light returns from, grey shows where it leaks (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: Only DG-M5 Amethyst returns more in amethyst: 85.

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

Who a DG-Anteros amethyst suits

For a round amethyst cut on the T73's familiar plan, DG-Anteros is a strong choice: close to DG-M5 for light, with more fire than either DG-M5 or the T73 in quartz.

A cutter who already knows the T73 will find nothing new in the facet sequence; only the angles change. On a first amethyst, that makes it an easy step up from the standard round.

For the most light in quartz, DG-M5 Amethyst. For a stone that holds steadier as it tips, the T73 Round Brilliant Amethyst.

DG-Anteros Amethyst: questions

Is DG-Anteros good for amethyst?

Yes, in our census: Brilliance 82 against 72 for the T73 in amethyst, with 18% leakage against 28%.

DG-Anteros or DG-M5 for amethyst?

DG-M5 returns a little more light (85 against 82); DG-Anteros has a little more fire (54 against 50) and keeps the T73's plan.

Why are this page's cons set against diamond?

Every score counts once, against the baseline it differs from more. Here the gaps to the diamond version are larger than the gaps to the T73, so those are the ones listed.

What does a 6.5 mm DG-Anteros amethyst weigh?

0.73 ct, against 0.97 ct in diamond.

Get the DG-Anteros Cut files

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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

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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

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Questions before you buy? Email us.

More gemstones and cuts

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

DG-Anteros Amethyst: lighter in weight than diamond, and second only to DG-M5 for light here