DG-Miliano Amethyst: Pros, Cons & Sparkle

DG-Miliano puts eight stars, eight crown mains and sixteen upper girdle facets over a 96-facet girdle, and cuts the pavilion in three tiers of sixteen, steepest at the girdle. Our model has 177 facets and quotes a 38.3° pavilion, 60.3% deep.

That 38.3° sits about two degrees under amethyst's guide minimum of 40.4°. Moissanite, with a far smaller critical angle, can work with it; quartz, at about 40.4°, lets 40% of the light out through the pavilion.

It holds what it keeps very steadily when tipped, Tilt 97, but that is a steady share of less light, so it is not a pro here.

Is amethyst a good match for DG-Miliano? Pros and cons

Pros

Lighter than diamond 0.78 vs 1.03 ct
Sparkle at the top of our scale 98 vs 80

Cons

A third of the diamond version's fire 28 vs 82
Two-fifths of the light leaks 40 vs 3
Much less light than in diamond 60 vs 95

Compared with the T73 Round Brilliant in amethyst 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 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 3, level on 1, behind on 4.

Global68, the comparison 70, difference −2
Brilliance60, the comparison 72, difference −12
Fire28, the comparison 36, difference −8
Scintillation98, the comparison 80, difference +18
Spread101, the comparison 100, difference +1
Symmetry100, the comparison 100, difference 0
Shape-norm65, the comparison 77, difference −12
Tilt97, the comparison 80, difference +17

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-Miliano

Lighter than diamond

0.78 ct at 6.5 mm, against 1.03 ct for the same cut in diamond (−25%)

0.78 ct for a 6.5 mm DG-Miliano in amethyst; 1.03 ct in diamond. Quartz is the less dense stone by about a quarter.

A DG-Miliano 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-Miliano page

Sparkle at the top of our scale

Scintillation 98 against 80 for the T73 Round Brilliant in amethyst: 18 points higher

A 177-facet plan, with sixteen-fold tiers and a finely divided girdle, puts it level with DG-Vitruvio at the top of our scale.

DG-Miliano · 177 facets · Scintillation 98

T73 Round Brilliant · 73 facets · Scintillation 80

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.

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

What quartz costs DG-Miliano

A third of the diamond version's fire

Fire 28 against 82 for the DG-Miliano in diamond: 54 points lower

Quartz's low dispersion is one reason; the light the pavilion lets go is another, since leaked light carries no colour to the eye.

Dg-miliano in amethyst face-up under a single bright light: a render from our simulator, its coloured flashes are the fire (score 28) — 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-miliano in diamond face-up under a single bright light: a render from our simulator, its coloured flashes are the fire (score 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: Among amethyst rounds, DG-Anteros Amethyst reaches 54; the Oval Cut Amethyst gives the most we measure, 69.

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

Two-fifths of the light leaks

Leakage 40 against 3 for the DG-Miliano in diamond: 37 points higher

40% of the light in our census escapes through the pavilion, against almost none for the same cut in diamond.

Dg-miliano in amethyst tilted 0 degrees: Light Return map, 31% of the face leaking — 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-miliano in amethyst tilted 10 degrees: Light Return map, 42% of the face leaking — 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: We have not measured a steeper DG-Miliano, so we make no promise for one. DG-M5 Amethyst, also drawn for moissanite, leaks 15% in amethyst.

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

Much less light than in diamond

Brilliance 60 against 95 for the DG-Miliano in diamond: 35 points lower

Of our rounds drawn for moissanite, DG-M5 and DG-Anteros keep most of their light in quartz. DG-Miliano does not: its face returns 60 where the T73 returns 72.

Dg-miliano in amethyst face-up Light Return map: red, green and blue show where the light returns from, grey shows where it leaks (Brilliance 60) — 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-miliano 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: DG-M5 Amethyst returns 85 in amethyst; for this sparkle with more light, DG-Vitruvio Amethyst returns 71.

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

Who a DG-Miliano amethyst suits

DG-Miliano in amethyst suits someone who wants the finest sparkle and a face that changes little as the stone moves, and who accepts a darker stone than the T73.

We would not choose it for light. Its pavilion was set for moissanite, and quartz shows the cost. As a cutting project it is also long: three pavilion tiers and a 96-facet girdle.

For the same top-of-scale sparkle with the T73's light, DG-Vitruvio Amethyst. For the most light, DG-M5 Amethyst.

DG-Miliano Amethyst: questions

Is DG-Miliano good for amethyst?

For sparkle, yes: 98. For light, no: Brilliance 60 against 72 for the T73, with 40% leakage.

DG-Miliano or DG-Vitruvio in amethyst?

DG-Vitruvio scores 98 for scintillation too, and returns more light (71 against 60) with less leakage (29% against 40%).

Why does DG-Miliano leak in amethyst?

Its 38.3° pavilion is below amethyst's 40.4° guide minimum, and quartz reflects light only when it meets a facet beyond 40.4°.

What does a 6.5 mm DG-Miliano amethyst weigh?

0.78 ct; 1.03 ct in diamond.

Get the DG-Miliano Cut files

6 formatsMillimetresWatertight

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.

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-Miliano Cut cutting files

The DG-Miliano Cut as a faceting design: 81 + 96 girdles = 177 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

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

DG-Miliano Amethyst: sparkle at the very top of our scale