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Seylan Gems & Jewelry

Hessonite buyer’s guide

Hessonite is an orange to brownish-orange grossular garnet. Ceylon stones are a traditional part of that trade. The color should be read as garnet, not as a substitute for sapphire and not as a promise about planets.

Specifications

Hessonite At a glance

Typical published ranges used in gemology. Specific gravity below matches our carat calculator default where applicable. (SG 3.70)

Hessonite Gemological specifications
Hardness (Mohs) About 7–7.5
Refractive index About 1.74
Optic character Singly refractive
Specific gravity About 3.6
Chemistry Grossular garnet, a calcium aluminum silicate
Lustre Vitreous

The internal look

Fine hessonite often shows a swirled, syrupy interior. Gemologists treat that rolled look as characteristic, not as a surprise inclusion. It is still worth seeing in a photo or a 360 view, because a heavily included stone and a lively one are not the same price.

It is singly refractive, which separates it from orange zircon and from sapphire.

Color, not a remedy

Look for a warm cinnamon or orange that stays transparent enough to show the interior. A dead brown is a different stone commercially, even if the species name is the same.

We do not sell hessonite as a remedy, a rashi stone, or a weight chosen for astrology. We sell it as a gem with a color, a size, and a description you can read.

Questions

Is hessonite the same as spessartine?

Both can be orange garnets. Hessonite is grossular and often shows that rolled interior. Spessartine is a different member of the garnet group. The listing should say which one.

Why does the calculator say garnet?

Hessonite is a garnet. The tool’s garnet density is a starting estimate. The listed carat weight is the weight we measured.

Educational / market education only. This page is not a certified laboratory report insurance appraisal or formal valuation for legal or customs purposes. Always confirm treatment and origin with documentation.

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