---
title: "Baguette Cut Iolite: Pros, Cons and Scores"
description: "Baguette Cut in iolite: brilliance 40, fire 64, leakage 54%, 3 pros and 4 cons against the T73, from our ray-traced light census."
url: https://digitalgemology.com/gemstones/iolite/baguette
image: https://digitalgemology.com/img/stone-cuts/baguette-iolite-og.jpg?v=de476314
---

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# Baguette Cut Iolite: lighter than the same cut in diamond

**Buy (instant download, personal-use license):** [Baguette Cut 3D files, €9.99 · Personal use](https://digitalgemology.lemonsqueezy.com/checkout/buy/f98a5f9b-a25e-4ed5-a5cc-92444ae9b2a0) · [Baguette Cut cutting files, €6.99 · Personal use](https://digitalgemology.lemonsqueezy.com/checkout/buy/f0f3b8ec-9290-43b0-a5a0-f230c2d4fa1f) · [Buy the bundle](https://digitalgemology.lemonsqueezy.com/checkout/buy/9170b0c0-5357-490e-b6ef-3ce4f7fcd282?checkout%5Bdiscount_code%5D=BUNDLE25) · [Get the cube free](https://digitalgemology.lemonsqueezy.com/checkout/buy/2d1ab55f-2bd6-4897-a4cd-f3320f54e99e)

Brilliance 40 · Fire 64 · Scintillation 43 · in our census, where the T73 scores 72 · 58 · 80 in iolite

How the Baguette Cut handles light in iolite, measured: brilliance 40, fire 64 and 54% leakage, set against the T73 in the same stone and against the same cut in diamond.

[Get the files](https://digitalgemology.com/gemstones/iolite/baguette#buy) [Open it in the Simulator](https://digitalgemology.com/tools/3d_gemstone_simulator?cut=baguette&stone=iolite&ct=1.00&view=angle&lighting=studio&turn=0) [All cuts in iolite](https://digitalgemology.com/gemstones/iolite)

Light Return map of the Baguette Cut in iolite, face-up, from our own tracer at refractive index 1.542. Red, green and blue return light to the eye; gray leaks.

## Baguette Cut Iolite

Iolite has a refractive index of 1.542 to 1.551 and a dispersion of 0.017. Its critical angle, from the low end of that range, is 40.4°, so a round design needs a pavilion of at least 40.4° for head-on light to reflect off both sides of the pavilion and leave through the table. We trace it with one index, 1.547, the midpoint of the published range, and a fire spread of 0.015, 0.86 of the published dispersion. Every picture here is our Light Return tracer at 1.542, and every figure is from the same light census that scores the other gemstones; the 3D Gemstone Simulator shows the Baguette Cut in iolite live.

The Baguette Cut has 21 facets and a total depth of 66.8% of its width; its pavilion mains sit at 32.4°. In iolite, the census returns 40 of 100 for brilliance and 64 for fire, against 72 and 58 for the T73, our benchmark, in the same stone; the same Baguette Cut in diamond reads 40 and 62.

## Is iolite good in a Baguette? Pros and cons, measured

### Pros

- [Lighter than the same cut in diamond](https://digitalgemology.com/gemstones/iolite/baguette#pro-weight) 2.70 vs 3.64 ct
- [Faces up larger for its weight](https://digitalgemology.com/gemstones/iolite/baguette#pro-faceup) 108 vs 100
- [More fire than the T73 in iolite](https://digitalgemology.com/gemstones/iolite/baguette#pro-fire) 64 vs 58

### Cons

- [A less regular pavilion than the T73](https://digitalgemology.com/gemstones/iolite/baguette#con-symm) 39 vs 100
- [Loses more light when tilted than in diamond](https://digitalgemology.com/gemstones/iolite/baguette#con-tiltStab) 62 vs 100
- [Fewer facets, less sparkle](https://digitalgemology.com/gemstones/iolite/baguette#con-scint) 43 vs 80
- [Returns less light than the T73 in iolite](https://digitalgemology.com/gemstones/iolite/baguette#con-brilliance) 40 vs 72

Compared with the T73 Round Brilliant in iolite and with the Baguette Cut in diamond. A difference counts from 3 points (Brilliance, Fire, Tilt, Leakage), 5 (Scintillation, Symmetry), 4% (face-up size per carat) 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](https://digitalgemology.com/about/how-we-measure).

## All eight scores against the T73

At a glance: the Baguette Cut in iolite (white) against the T73 Round Brilliant in iolite (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 iolite: ahead on 1, behind on 7.

- Global 49, the comparison 74, difference −25
- Brilliance 40, the comparison 72, difference −32
- Fire 64, the comparison 58, difference +6
- Scintillation 43, the comparison 80, difference −37
- Spread 97, the comparison 100, difference −3
- Symmetry 39, the comparison 100, difference −61
- Shape-norm 52, the comparison 77, difference −25
- Tilt 62, the comparison 81, difference −19

Face-up light census, a different measure from the Cut Grading Tool; Spread and Shape-norm above 100 sit on the ring. Spread is the census's estimate from depth alone; the face-up size in the pros and cons is measured from each model's outline. [Open it in the Cut Performance Wheel](https://digitalgemology.com/tools/cut-performance-wheel?cut=baguette&stone=iolite); these are the same census figures as our [Cut Performance Index](https://digitalgemology.com/learn/cut-performance-index).

## What the Baguette Cut gains in iolite

### Lighter than the same cut in diamond

**2.70 ct** at 6.5 mm, against 3.64 ct for the same cut in diamond (−26%)

Weight follows specific gravity: 2.61 for iolite against 3.52 for diamond, so the same model at the same size weighs 2.70 ct here and 3.64 ct in diamond, 6.5 mm across. Nothing about the light changes with it.

*Weight of a 6.5 mm Baguette Cut: 2.70 ct in iolite, 3.64 ct in diamond*

A Baguette Cut 6.5 mm across, weighed from the model's measured volume and each stone's specific gravity.

[Try it yourself: Weights in every gemstone on the Baguette Cut page](https://digitalgemology.com/cuts/baguette#stones)

### Faces up larger for its weight

**Face-up size 108** against 100 for the T73 Round Brilliant in iolite (T73 = 100): 8% more face-up area for the same weight

Face-up size is the outline's area per carat, measured from each model (T73 = 100): 108 for the Baguette Cut against 100 for the T73. The same volume spread over a longer or shallower outline shows more face for the weight; it is the same in every stone, because specific gravity scales every cut alike.

*Face-up outline of the Baguette Cut at 1.00 ct in iolite: 9.22 x 4.67 mm, drawn to scale*

Baguette Cut · 9.22 x 4.67 mm at 1.00 ct · Face-up size 108

*Face-up outline of the T73 Round Brilliant at 1.00 ct in iolite: 7.15 mm, drawn to scale*

T73 Round Brilliant · 7.15 mm at 1.00 ct · Face-up size 100

Both stones weigh 1.00 ct in iolite and are drawn to the same scale in millimeters, from each cut's own model. Face-up size is the outline's area per carat, with the T73 at 100: a deeper stone, or a rounder outline, spreads less area for its weight.

[Try it yourself: See its size at 1.00 ct in iolite in the 3D Gemstone Simulator](https://digitalgemology.com/tools/3d_gemstone_simulator?cut=baguette&stone=iolite&ct=1.00&view=up&lighting=studio&turn=0)

### More fire than the T73 in iolite

**Fire 64** against 58 for the T73 Round Brilliant in iolite: 6 points higher

Fire is the share of the returned light that splits into color at the exit facet: the census traces each exit again at the refractive index minus and plus the fire spread (0.015 in iolite) and counts a ray as fire when the two directions differ by more than 0.6°. The Baguette Cut reads 64 against 58 for the T73 in iolite. The figure is the census's; the 3D Gemstone Simulator renders iolite's fire live.

The fire figure is the census's, traced at the refractive index minus and plus the fire spread. [See the fire in the 3D Gemstone Simulator](https://digitalgemology.com/tools/3d_gemstone_simulator?cut=baguette&stone=iolite&ct=1.00&view=up&lighting=sun&turn=0): the Baguette Cut in iolite under the sunny-day lighting.

[Try it yourself: See the fire in the 3D Gemstone Simulator](https://digitalgemology.com/tools/3d_gemstone_simulator?cut=baguette&stone=iolite&ct=1.00&view=up&lighting=sun&turn=0)

## What the Baguette Cut gives up in iolite

### A less regular pavilion than the T73

**Symmetry 39** against 100 for the T73 Round Brilliant in iolite: 61 points lower

Symmetry reads how evenly the pavilion facets of each design family are cut: 100 − 6 × their scatter in degrees. The Baguette Cut reads 39, the T73 100. It depends on the geometry alone, so it is the same in every stone.

*Facet diagram of the Baguette Cut: its pavilion, seen from below, 21 facets in all*

Baguette Cut · 21 facets · Symmetry 39

*Facet diagram of the T73 Round Brilliant: its pavilion, seen from below, 73 facets in all*

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.

[Try it yourself: Compare the Symmetry spoke in the Cut Performance Wheel](https://digitalgemology.com/tools/cut-performance-wheel?cut=baguette&stone=iolite)

### Loses more light when tilted than in diamond

**Tilt 62** against 100 for the Baguette Cut in diamond: 38 points lower

Tilt is how much of its face-up brilliance a stone keeps when the census tilts it 20° about its long axis, with 2,200 rays. The Baguette Cut keeps 62 against 100 for the same cut in diamond. The tilt strips below show the maps at 0°, 10°, 20° and 30°, with each picture's own leak share under it.

Baguette Cut in iolite · Tilt 62

0° · 45% leak

10° · 57% leak

20° · 64% leak

30° · 74% leak

Baguette Cut in diamond · Tilt 100

0° · 43% leak

10° · 44% leak

20° · 44% leak

30° · 44% 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; gray is leakage. The share under each frame is that picture's own.

**What helps:** [the T105 Round Brilliant](https://digitalgemology.com/gemstones/iolite/t105-round-brilliant) reads 87 for tilt in iolite, the best of the cuts we score there.

[Try it yourself: Compare the Tilt spoke in the Cut Performance Wheel](https://digitalgemology.com/tools/cut-performance-wheel?cut=baguette&stone=iolite&vs=baguette&vsstone=diamond)

### Fewer facets, less sparkle

**Scintillation 43** against 80 for the T73 Round Brilliant in iolite: 37 points lower

Scintillation follows the number of facets the stone shows: 100 × (1 − e^(−facets / 45)). The Baguette Cut has 21 facets and the T73 73, so 43 against 80. It depends on the geometry alone, so it is the same in every stone.

*Facet diagram of the Baguette Cut: its crown, seen face-up, 21 facets in all*

Baguette Cut · 21 facets · Scintillation 43

*Facet diagram of the T73 Round Brilliant: its crown, seen face-up, 73 facets in all*

T73 Round Brilliant · 73 facets · Scintillation 80

Scintillation follows the number of facets: more facets, more and smaller flashes as the stone moves. Compare the facet counts under the drawings; each drawing shows only the crown. Drawn from each cut's own model.

**What helps:** [the DG-Miliano](https://digitalgemology.com/gemstones/iolite/dg-miliano) reads 98 for scintillation in iolite, the best of the cuts we score there.

[Try it yourself: Compare the Scintillation spoke in the Cut Performance Wheel](https://digitalgemology.com/tools/cut-performance-wheel?cut=baguette&stone=iolite)

### Returns less light than the T73 in iolite

**Brilliance 40** against 72 for the T73 Round Brilliant in iolite: 32 points lower

Brilliance is the share of the 3,200 census rays that enter the stone and come back out of the crown towards the viewer. In iolite, whose critical angle is 40.4°, the Baguette Cut returns 40 of 100 and the T73 72. The Baguette Cut's pavilion mains sit at 32.4°, the T73's at 40.8°. The maps below show where each stone's light returns from and where it leaks.

Baguette Cut in iolite · Brilliance 40

T73 Round Brilliant in iolite · Brilliance 72

Red, green and blue = light returning to the eye; gray = leakage, light that leaves heading down or stays inside. 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:** [the DG-M5](https://digitalgemology.com/gemstones/iolite/dg-m5) reads 85 for brilliance in iolite, the best of the cuts we score there.

[Try it yourself: Open this Light Return map in the simulator](https://digitalgemology.com/tools/3d_gemstone_simulator?cut=baguette&stone=iolite&ct=1.00&view=up&map=1&turn=0)

## Our verdict on the Baguette Cut in iolite

Pick the Baguette Cut in iolite for this: it weighs less than in diamond, faces up larger for its weight and shows more fire than the T73. The catch: it has a less regular pavilion than the T73, loses more light when tilted than in diamond, has fewer facets to sparkle with and returns less light than the T73.

If that catch matters more to you, [the T105 Round Brilliant](https://digitalgemology.com/gemstones/iolite/t105-round-brilliant) reads 87 for tilt in iolite, the best of the cuts we score there.

Every figure on this page is from our light census, traced at one refractive index: a simulation of the geometry, not a grading report. The 3D files and cutting files below are the same Baguette Cut model we traced.

## Baguette Cut Iolite: questions

### Is the Baguette a good cut for iolite?

In our census the Baguette Cut returns 40 of 100 for brilliance and 64 for fire in iolite, against 72 and 58 for the T73 in the same stone. Against that round and against the same cut in diamond it has 3 pros and 4 cons by our thresholds; the summary above names them.

### What pavilion angle does iolite need?

At least 40.4° for a round design: iolite's critical angle is 40.4°, from the low end of its refractive index range, and head-on light has to reflect off both sides of the pavilion and leave through the table. The Baguette Cut's pavilion mains sit at 32.4°.

### How much does a Baguette weigh in iolite?

At 6.5 mm across, 2.70 ct in iolite, against 3.64 ct for the same cut in diamond (-26%): iolite's specific gravity is 2.61, diamond's 3.52.

### Can I see the Baguette in iolite in 3D?

Yes: the 3D Gemstone Simulator renders it live, with iolite's own refractive index and dispersion. Iolite is traced by the same light census as the other gemstones, with its refractive index and fire spread derived from published values, so its scores are on the same scale; the pictures here are our Light Return tracer, and the Cut Performance Wheel sets it against any other cut and stone.

## Get the Baguette Cut files

*6 formats* *Millimeters* *Watertight*

### Baguette Cut 3D files

The Baguette Cut as exact geometry: 21 planar facets, real-world scale, ready for CAD, rendering, printing and casting.

- **STEP** Exact faceted solid for CAD
- **3DM** Rhino, closed mesh on its own layer
- **STL** Watertight mesh for printing and casting
- **OBJ** Mesh for modeling and rendering
- **FBX** Blender, 3ds Max, Maya, Cinema 4D, Unity, Unreal
- **GLB** Web, AR and quick previews

€9.99 · [Personal use](https://digitalgemology.com/licence) [Buy the 3D files](https://digitalgemology.lemonsqueezy.com/checkout/buy/f98a5f9b-a25e-4ed5-a5cc-92444ae9b2a0)

*GemCad* *96 index*

### Baguette Cut cutting files

The Baguette Cut as a faceting design: 17 + 4 girdles = 21 facets, 96 index, 2-fold mirror-image symmetry, ready for the machine.

- **.asc** GemCad design file, 96 index gear
- **.csv** Tier table: angles, indices and cutting order
- **Diagram** Printable faceting diagram

€6.99 · [Personal use](https://digitalgemology.com/licence) [Buy the cutting files](https://digitalgemology.lemonsqueezy.com/checkout/buy/f0f3b8ec-9290-43b0-a5a0-f230c2d4fa1f)

Save with a bundle: the Baguette Cut cutting files are also in [Faceter's Classics](https://digitalgemology.com/cuts/#bundles), 10 cuts for €22.49 until 1 December, then €29.99 (€69.90 as single files). [Buy the bundle](https://digitalgemology.lemonsqueezy.com/checkout/buy/9170b0c0-5357-490e-b6ef-3ce4f7fcd282?checkout%5Bdiscount_code%5D=BUNDLE25).

Not sure the files open in your software? [Get the cube free](https://digitalgemology.lemonsqueezy.com/checkout/buy/2d1ab55f-2bd6-4897-a4cd-f3320f54e99e): the same six formats, for your email address, used only to send them ([privacy](https://digitalgemology.com/privacy#free-sample)).

Questions before you buy? [Email us](mailto:support@digitalgemology.com).

## More gemstones and cuts

[Iolite: optical properties and the top ten cuts](https://digitalgemology.com/gemstones/iolite) · [The Baguette Cut: specifications, model and files](https://digitalgemology.com/cuts/baguette)

### Other cuts in iolite

- [T73 Round Brilliant](https://digitalgemology.com/gemstones/iolite/t73-round-brilliant)
- [T105 Round Brilliant](https://digitalgemology.com/gemstones/iolite/t105-round-brilliant)
- [DG-Vitruvio](https://digitalgemology.com/gemstones/iolite/dg-vitruvio)
- [DG-Anteros](https://digitalgemology.com/gemstones/iolite/dg-anteros)
- [DG-Broken Hearts and Arrows](https://digitalgemology.com/gemstones/iolite/dg-broken-hearts-and-arrows)
- [Emerald Cut](https://digitalgemology.com/gemstones/iolite/emerald-cut)
- [Marquise Cut](https://digitalgemology.com/gemstones/iolite/marquise)
- [Oval Cut](https://digitalgemology.com/gemstones/iolite/oval)
- [Pear Cut](https://digitalgemology.com/gemstones/iolite/pear)
- [Radiant Cut](https://digitalgemology.com/gemstones/iolite/radiant)
- [Rectangle Cut](https://digitalgemology.com/gemstones/iolite/rectangle)
- [Teardrop Cut](https://digitalgemology.com/gemstones/iolite/teardrop)
- [Asscher Cut](https://digitalgemology.com/gemstones/iolite/asscher)
- [Cushion Cut](https://digitalgemology.com/gemstones/iolite/cushion)
- [Emerald Square Cut](https://digitalgemology.com/gemstones/iolite/emerald-square)
- [Princess Cut](https://digitalgemology.com/gemstones/iolite/princess)
- [Radiant Square Cut](https://digitalgemology.com/gemstones/iolite/radiant-square)
- [Square Cut](https://digitalgemology.com/gemstones/iolite/square)
- [Triangle Cut](https://digitalgemology.com/gemstones/iolite/triangle)
- [Trilliant Cut](https://digitalgemology.com/gemstones/iolite/trilliant)
- [Trillion Cut](https://digitalgemology.com/gemstones/iolite/trillion)
- [Hexagon Cut](https://digitalgemology.com/gemstones/iolite/hexagon)
- [Octagon Cut](https://digitalgemology.com/gemstones/iolite/octagon)
- [Portuguese Bird's Nest Cut](https://digitalgemology.com/gemstones/iolite/portuguese-birds-nest)
- [Old Single Cut](https://digitalgemology.com/gemstones/iolite/old-single)
- [Mazarin Cut](https://digitalgemology.com/gemstones/iolite/mazarin)
- [Peruzzi Cut](https://digitalgemology.com/gemstones/iolite/peruzzi)
- [Old Mine Cut](https://digitalgemology.com/gemstones/iolite/old-mine)
- [Old European Cut](https://digitalgemology.com/gemstones/iolite/old-european)
- [T57 Round Brilliant](https://digitalgemology.com/gemstones/iolite/t57-round-brilliant)
- [DG-M5](https://digitalgemology.com/gemstones/iolite/dg-m5)
- [DG-Miliano](https://digitalgemology.com/gemstones/iolite/dg-miliano)
- [DG-Rafaello](https://digitalgemology.com/gemstones/iolite/dg-rafaello)
- [DG-Bowtie](https://digitalgemology.com/gemstones/iolite/dg-bowtie)
- [DG-Elongated Hexagon](https://digitalgemology.com/gemstones/iolite/dg-elongated-hexagon)
- [DG-Octagonal Kite](https://digitalgemology.com/gemstones/iolite/dg-octagonal-kite)

### The Baguette Cut in other gemstones

- [Diamond](https://digitalgemology.com/gemstones/diamond/baguette)
- [Moissanite](https://digitalgemology.com/gemstones/moissanite/baguette)
- [Cubic Zirconia](https://digitalgemology.com/gemstones/cubic-zirconia/baguette)
- [Ruby](https://digitalgemology.com/gemstones/ruby/baguette)
- [Sapphire](https://digitalgemology.com/gemstones/sapphire/baguette)
- [Emerald](https://digitalgemology.com/gemstones/emerald/baguette)
- [Amethyst](https://digitalgemology.com/gemstones/amethyst/baguette)
- [Topaz](https://digitalgemology.com/gemstones/topaz/baguette)
- [Spinel](https://digitalgemology.com/gemstones/spinel/baguette)
- [Demantoid](https://digitalgemology.com/gemstones/demantoid/baguette)
- [Zircon](https://digitalgemology.com/gemstones/zircon/baguette)
- [Tourmaline](https://digitalgemology.com/gemstones/tourmaline/baguette)
- [Peridot](https://digitalgemology.com/gemstones/peridot/baguette)
- [Tanzanite](https://digitalgemology.com/gemstones/tanzanite/baguette)
- [YAG](https://digitalgemology.com/gemstones/yag/baguette)
- [Pyrope](https://digitalgemology.com/gemstones/pyrope/baguette)
- [Almandine](https://digitalgemology.com/gemstones/almandine/baguette)
- [Spessartine](https://digitalgemology.com/gemstones/spessartine/baguette)
- [Grossular](https://digitalgemology.com/gemstones/grossular/baguette)
- [Chrysoberyl](https://digitalgemology.com/gemstones/chrysoberyl/baguette)
- [Kunzite](https://digitalgemology.com/gemstones/kunzite/baguette)
- [Morganite](https://digitalgemology.com/gemstones/morganite/baguette)
- [GGG](https://digitalgemology.com/gemstones/ggg/baguette)
- [Strontium titanate](https://digitalgemology.com/gemstones/strontium-titanate/baguette)
- [Synthetic rutile](https://digitalgemology.com/gemstones/synthetic-rutile/baguette)