Spessartine is a manganese-rich member of the garnet group, famous for its vivid 'mandarin' orange hue. Collectors often look for sharp dodecahedral crystals in pegmatites or gem-quality pieces suitable for faceting, as high-clarity specimens are highly sought after in the jewelry market.
Is this spessartine garnet?
5-step field checkRun through these checks against the specimen in your hand. The more boxes tick, the more confident the ID.
- 1Test the hardnessTry to scratch spessartine garnet with a known reference. Spessartine Garnet sits at Mohs 6.5-7.5, softer than the next harder reference, harder than the previous one.
- 2Check the streakDrag the specimen across an unglazed porcelain plate. Streak: white.
- 3Read the lusterHold the specimen under a strong light. Luster: vitreous.
- 4Match the color rangeCompare against the expected color range: orange, red-orange, yellow-orange, red-brown.
- 5Look at form & habitCrystal system: cubic. Typical habit: dodecahedral or trapezohedral crystals, often rounded.
Often confused with
Spessartine Garnet vs. its common look-alikes, and how to tell them apart in the field.
Often found alongside spessartine garnet
Minerals reported to co-occur with spessartine garnet. Spotting these in float or country rock is a strong cue you are in the right ground.
All properties
- Chemical formula
- Mn₃Al₂(SiO₄)₃
- Mohs hardness
- 6.5-7.5
- Density
- 4.12-4.20 g/cm³
- Streak
- White
- Luster
- Vitreous
- Transparency
- Transparent
- Crystal system
- Cubic
- Crystal habit
- Dodecahedral or trapezohedral crystals, often rounded
- Cleavage
- None
- Rarity
- Uncommon
- Uses
- Gemstone, Collector
- Host rock
- granite pegmatites, metamorphic schists, and skarns
Where rockhounds find spessartine garnet
4 mapped spotsClassic worldwide localities
- Namibia
- Nigeria
- Brazil
- Madagascar
- USA
Field-hunting tip
Where it forms: granite pegmatites, metamorphic schists, and skarns. If you start seeing quartz, microcline, albite in float, you are in the right ground. Typical habit: dodecahedral or trapezohedral crystals, often rounded. Train your eye for that shape before scanning the outcrop. In the U.S., the densest reported localities are in California, Maine, New Hampshire. Start trip planning there.
Common questions
How do you identify spessartine garnet?+
Where is spessartine garnet found?+
Can I find spessartine garnet in the United States?+
What rocks look like spessartine garnet?+
What minerals are found with spessartine garnet?+
What kind of rock does spessartine garnet form in?+
What is spessartine garnet used for?+
Find spessartine garnet on the map
RockHoundR shows mapped rockhounding spots, access rules, and lets you log every find.
