Hessonite Garnet Identification Guide
Identify hessonite, the cinnamon-orange grossular garnet, by its honey color, treacly internal swirls, and garnet hardness.
Read the full Hessonite Garnet encyclopedia entry →
What Hessonite Looks Like
Hessonite is the orange-to-brown variety of grossular garnet (a calcium-aluminum garnet), colored by iron and manganese. It is famous in the gem trade as the "cinnamon stone" for its warm honey-orange hue, and in Vedic astrology as gomed.
- Color: honey-orange, cinnamon-brown, golden-orange to brownish-red.
- Luster: vitreous to slightly resinous or oily.
- Transparency: transparent to translucent.
- Habit: rounded dodecahedral/trapezohedral crystals or waterworn pebbles; cut as faceted gems.
- Signature feature: a characteristic "heat-wave" or treacly/syrupy internal texture with swirly, roiled inclusions (often tiny apatite/zircon crystals) visible with a loupe.
Field-ID Checklist
- Note the warm orange-to-cinnamon color — not the deep red of almandine or pyrope.
- Use a loupe to find the roiled, oily, heat-wave internal look — almost diagnostic for hessonite.
- Check hardness: scratches glass readily (about 7–7.5).
- Confirm the isotropic garnet character (stays dark when rotated between crossed polarizers).
- Check it is singly refractive and non-magnetic to weakly attracted.
Key Diagnostic Tests
- Mohs hardness: 7–7.5.
- Streak: white.
- Cleavage/fracture: none; conchoidal to uneven fracture.
- Density: ~3.5–3.7 g/cm3 (heavy; sinks fast, useful for hand-sorting).
- Refractive index: ~1.73–1.75, singly refractive.
- Magnetism: grossular is only weakly magnetic; strong magnet response suggests an iron-rich garnet instead.
Common Look-Alikes
- Spessartine garnet: also orange but typically more vivid/pure orange, slightly higher RI and density; spessartine is strongly magnetic, hessonite only weakly so.
- Citrine/topaz: these are doubly refractive and lighter; citrine is softer than topaz, and neither shows the heat-wave inclusions.
- Hessonite vs amber: amber is far softer (2–2.5), warm to the touch, and floats in saltwater; hessonite is hard and dense.
- Orange sapphire/padparadscha: harder (9), doubly refractive, no garnet heat-wave texture.
The practical fingerprint: warm honey-cinnamon color + garnet hardness + singly refractive + roiled "treacle" inclusions.
Where It Is Found
Major sources are Sri Lanka (the classic cinnamon stones), India, Madagascar, Brazil, Tanzania, and Canada (Quebec, Asbestos). It occurs in metamorphosed limestones (skarns), calc-silicate rocks, and as alluvial gem gravels.
Frequently asked questions
How can you tell if it is real hessonite garnet?
Real hessonite is a honey-orange to cinnamon-brown stone with garnet hardness (7–7.5), is singly refractive (stays dark under crossed polarizers), is heavy, and shows a distinctive roiled, oily 'heat-wave' texture inside under a loupe. That treacly internal look is its best fingerprint.
What does hessonite look like?
It looks like a warm honey-orange to cinnamon or brownish-red garnet, transparent to translucent, with a glassy-to-slightly-greasy luster and swirly internal inclusions.
Hessonite vs spessartine garnet — how are they different?
Spessartine is usually a purer, brighter orange and is strongly magnetic, while hessonite is more honey/cinnamon toned and only weakly magnetic. Spessartine also has a slightly higher refractive index and density.
Is hessonite the same as cinnamon stone?
Yes. 'Cinnamon stone' is the trade name for hessonite because of its warm brownish-orange color. It is the orange variety of grossular garnet.