Mozambique Garnet Identification Guide
How to identify Mozambique garnet, a pyrope-almandine red garnet, using color, hardness, single refraction, and density tests against rubies and glass.
Read the full Mozambique Garnet encyclopedia entry →
What Mozambique Garnet Looks Like
Mozambique garnet is a pyrope-almandine garnet mined in Mozambique, prized for its bright red to purplish-red and raspberry-red color. It is a member of the isometric (cubic) garnet group.
- Color: red, purplish-red, raspberry, occasionally orangey-red
- Luster: vitreous (glassy), bright
- Transparency: transparent to translucent
- Habit: rounded grains, water-worn pebbles, and dodecahedral/trapezohedral crystals
- Cut stones: clean, often eye-clean with strong saturation
Step-by-Step Field ID Checklist
- Confirm a glassy vitreous luster and a warm red body color.
- Look for rounded dodecahedral crystal forms if in matrix or as a rough pebble.
- Test hardness against quartz — garnet (7-7.5) will scratch quartz.
- Check that it is singly refractive (garnet shows no doubling of back facets).
- Estimate density — garnet feels heavy in the hand for its size.
Key Diagnostic Tests
- Mohs hardness: 7-7.5. Scratches glass and quartz easily.
- Streak: white.
- Cleavage/fracture: no cleavage; conchoidal to uneven fracture (a key garnet trait).
- Density: high, SG ~3.7-4.0 — garnet sinks fast and feels dense.
- Optics: singly refractive (isotropic); no birefringence doubling, no pleochroism.
- Magnetism: iron-bearing garnets can show weak attraction to a strong neodymium magnet.
Common Look-Alikes and How to Tell Them Apart
- Rhodolite garnet: essentially the same pyrope-almandine series but more purplish/rose; "Mozambique" is a locality/marketing label and the two grade into each other — color saturation and tone are the main distinction.
- Ruby: ruby is doubly refractive, harder (Mohs 9), strongly dichroic, and often fluoresces red; garnet is singly refractive and softer.
- Red spinel: also singly refractive but lighter (SG ~3.6) and harder (8); spinel rarely reaches garnet's density.
- Red glass: glass is softer (5-6), often has bubbles and swirl marks, and feels lighter; garnet's higher hardness and density separate it.
Where It Is Found
The principal source is the alluvial and gem-gravel deposits of northern Mozambique (notably around the Niassa region), with related pyrope-almandine garnet occurring across the East African gem belt into Tanzania.
Frequently asked questions
How can you tell if it's real Mozambique garnet?
Real Mozambique garnet is singly refractive (no doubling of facets), has a hardness of 7-7.5, shows conchoidal fracture with no cleavage, and is dense (SG 3.7-4.0) so it feels heavy. It also lacks the bubbles and swirl marks of glass imitations.
What is the difference between Mozambique garnet and rhodolite?
Both belong to the pyrope-almandine series. Rhodolite is defined by a purplish rose-red tone, while Mozambique garnet is often a brighter or slightly more orangey red. The names overlap and are mainly distinguished by color and locality.
Mozambique garnet vs ruby — how do you tell them apart?
Ruby is doubly refractive, harder (Mohs 9), strongly dichroic, and commonly fluoresces. Mozambique garnet is singly refractive, softer (7-7.5), and shows no pleochroism, so a loupe and refractometer distinguish them readily.
Is Mozambique garnet magnetic?
Iron-bearing red garnets like the pyrope-almandine Mozambique type can show a weak pull toward a strong neodymium magnet, which helps separate them from ruby and spinel that are inert.
Mozambique Garnet identified by the community
Recent Mozambique Garnet specimens identified with Rock Identifier.
