Peruzzi Cut Moissanite: Pros, Cons & Fire

The Peruzzi already sparkles like a modern round in diamond; what it lacks there is fire and light. Moissanite supplies the fire: Fire 94, against 68 in diamond.

It keeps hold of its light when tilted, too, better than the same cut in diamond, and its brilliance is close enough for that to count. The cost is light lost through the back, and a little size.

Is moissanite good in a Peruzzi cut? Pros and cons

Pros

Much more fire than in diamond 94 vs 68
Lighter than the diamond version 1.21 vs 1.32 ct
Holds its light a little better when tilted 96 vs 92

Cons

Less light than a modern round 71 vs 86
A less regular pavilion 85 vs 100
More leakage than the T73 15 vs 7
A little smaller for its weight 96 vs 100

Compared with the T73 Round Brilliant in moissanite and with the Peruzzi Cut 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 Peruzzi Cut in moissanite (white) against the T73 Round Brilliant in moissanite (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 moissanite: ahead on 3, behind on 5.

Global84, the comparison 91, difference −7
Brilliance71, the comparison 86, difference −15
Fire94, the comparison 97, difference −3
Scintillation81, the comparison 80, difference +1
Spread96, the comparison 100, difference −4
Symmetry85, the comparison 100, difference −15
Shape-norm112, the comparison 93, difference +19
Tilt96, the comparison 94, difference +2

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 moissanite gains in a Peruzzi cut

Much more fire than in diamond

Fire 94 against 68 for the Peruzzi Cut in diamond: 26 points higher

Moissanite's dispersion is more than twice diamond's, and the Peruzzi's many crown facets show it in small, bright flashes of colour.

Peruzzi cut in moissanite face-up under a single bright light: a render from our simulator, its coloured flashes are the fire (score 94) — 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.

Peruzzi cut in diamond face-up under a single bright light: a render from our simulator, its coloured flashes are the fire (score 68) — 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.

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

Lighter than the diamond version

1.21 ct at 6.5 mm, against 1.32 ct for the same cut in diamond (−9%)

The Peruzzi is a deep, heavy outline, and moissanite, at 3.22 against 3.52, takes some of that weight off.

A Peruzzi Cut 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 Peruzzi Cut page

Holds its light a little better when tilted

Tilt 96 against 92 for the Peruzzi Cut in diamond: 4 points higher

Tipped by 20°, it keeps 96 of its face-up light against 92 for the same cut in diamond. Its brilliance is within a few points of the diamond's, so this is a real gain.

Peruzzi cut in moissanite tilted 0 degrees: Light Return map, 18% 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.

Peruzzi cut in moissanite tilted 10 degrees: Light Return map, 18% 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.

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

The catch with a Peruzzi moissanite

Less light than a modern round

Brilliance 71 against 86 for the T73 Round Brilliant in moissanite: 15 points lower

In the face-up maps the T73 is nearly all colour; the Peruzzi has grey in its corners.

Peruzzi cut in moissanite face-up Light Return map: red, green and blue show where the light returns from, grey shows where it leaks (Brilliance 71) — 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 moissanite face-up Light Return map: red, green and blue show where the light returns from, grey shows where it leaks (Brilliance 86) — 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: For a brighter stone in moissanite, DG-Anteros (92); for a brighter cushion, our modern Cushion Cut (74).

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

A less regular pavilion

Symmetry 85 against 100 for the T73 Round Brilliant in moissanite: 15 points lower

The pavilion mixes facets of different sizes, so our symmetry score is 85.

Peruzzi Cut · 74 facets · Symmetry 85

T73 Round Brilliant · 73 facets · Symmetry 100

Symmetry scores how regular the pavilion facets are within the design. Compare how evenly the facets repeat around each pavilion. Drawn from each cut's own model.

What helps: It is the design, not poor cutting. The Old European Cut Moissanite keeps a regular pavilion (100).

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

More leakage than the T73

Leakage 15 against 7 for the T73 Round Brilliant in moissanite: 8 points higher

The census loses 15% of the light through the pavilion; the T73 loses 7% in moissanite.

What helps: The angles set the share at any size. DG-Anteros leaks 3%.

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

A little smaller for its weight

Spread 96 against 100 for the T73 Round Brilliant in moissanite: 4 points lower

At 69.1% deep it is narrower for its weight than the T73.

Peruzzi Cut · 6.11 mm at 1.00 ct · Spread 96

T73 Round Brilliant · 6.68 mm at 1.00 ct · Spread 100

Both stones weigh 1.00 ct in moissanite and are drawn to the same scale, from each cut's own model. Spread is face-up size per carat: a deeper stone carries more weight below the girdle and looks smaller for its weight.

What helps: Pick the stone by its width; at 6.5 mm a Peruzzi is 1.21 ct.

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

Who a Peruzzi moissanite suits

Of the antique cushions in moissanite this is the one we would pick: the most light and fire of the three we measure, and sparkle level with the Old Mine. It suits a vintage-style ring where colour is welcome.

For the most light in moissanite, DG-Anteros Moissanite. For an antique round, the Old European Cut Moissanite.

Its total depth of 69.1% sits deeper in a setting than a modern round's; allow for it in the setting's height.

Peruzzi Cut Moissanite: questions

Is a Peruzzi cut good for moissanite?

It is the strongest antique cushion we measure in moissanite: Brilliance 71, Fire 94 and Scintillation 81.

Does Peruzzi cut moissanite have more fire than diamond?

Yes: Fire 94 against 68 for the same cut in diamond.

Will a Peruzzi moissanite show doubling?

Our renders trace a single refractive index, so they cannot show moissanite's double refraction. Cutters hide it by orienting the table.

How much does a Peruzzi moissanite weigh?

A Peruzzi 6.5 mm across weighs about 1.21 ct in moissanite. The same outline in diamond is 1.32 ct, because moissanite is the lighter material.

Get the Peruzzi Cut files

6 formatsMillimetresWatertight

Peruzzi Cut 3D files

The Peruzzi Cut as exact geometry: 74 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

Peruzzi Cut cutting files

The Peruzzi Cut as a faceting design: 58 + 16 girdles = 74 facets, 96 index, 4-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

Moissanite: optical properties and the top ten cuts · The Peruzzi Cut: specifications, model and files

Peruzzi Cut Moissanite: an antique cushion with modern sparkle and strong fire