Spessartine is a manganese-rich garnet prized for its vibrant orange to reddish-orange color, often marketed as mandarin garnet. It typically forms as sharp, well-developed dodecahedral crystals in pegmatites and metamorphic environments. Collectors should look for high-luster, gemmy crystals, especially from the famous pockets of Namibia and Brazil.

Hardness

6.5-7.5

Mohs

Luster

Vitreous

Streak

White

Transparency

Translucent

mineraluncommonGarnet Group family

Spessartine

Hardness: 6.5-7.5
Luster: Vitreous
Streak: White
Transparency: Translucent

Spotting spessartine in the field

Field marks

1
Orange to reddish orange, often bright and transparent
2
Standard rounded garnet crystal form
3
Frequently perched on feldspar or smoky quartz in pegmatite pockets

Spessartine is the manganese garnet and its orange is distinctive enough to identify on sight. Unlike almandine it is a pegmatite pocket mineral more than a schist mineral, so the search is different: work pegmatite pocket zones and dumps. Small bright orange crystals on white feldspar make some of the most attractive small cabinet specimens in the hobby, and they are often worth more as specimens than as cut stones.

Straight answers

Is it worth cutting?: Facets very well and the bright orange is striking. Clean material is uncommon in larger sizes.
What is it really worth?: Moderate to high for clean transparent stones with strong orange color. Specimen material on matrix often outsells the loose crystals.
Can you legally keep it?: Pegmatite localities vary between claimed, private and open. Check status.

Often confused with

Spessartine vs. its common look-alikes, and how to tell them apart in the field.

mineral

Almandine

Mohs 7-7.5

How to tell apart: Color. Spessartine is orange, almandine is deep red to brownish red.

How to tell apart: Hessonite grossular is also orange-brown but usually has a characteristic swirled internal texture under magnification.

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Often found alongside spessartine

Minerals reported to co-occur with spessartine. 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
Colors: Orange Red-orange Red Brownish-red
Streak: White
Luster: Vitreous
Transparency: Translucent
Crystal system: Cubic
Crystal habit: Dodecahedral or Trapezohedral Crystals
Cleavage: None
Rarity: Uncommon
Uses: Collector, Gemstone, Lapidary
Host rock: Granite Pegmatites, Metamorphic Rocks
Typical price: $10-100 per gram for gem quality, $20-200 per specimen

Where rockhounds find spessartine

1 mapped spots

Classic worldwide localities

Brazil
Madagascar
Namibia
USA
Pakistan
Nigeria

Field-hunting tip

Look in granite pegmatites, metamorphic rocks country, the host setting where spessartine typically forms. If you start seeing quartz, microcline, albite in float, you are in the right ground. Field specimens usually show a dodecahedral or trapezohedral crystals habit, so train your eye for that shape before scanning the outcrop. In the U.S., the densest reported localities are in Colorado. Start trip planning there.

Browse 1 U.S. spots for spessartine →

Common questions

How do you identify spessartine?+

Mohs hardness is 6.5-7.5. It typically shows a vitreous luster. The streak is white. Common colors include orange, red-orange, red, brownish-red.

Where is spessartine found?+

Notable localities include Brazil; Madagascar; Namibia; USA; Pakistan.

Can I find spessartine in the United States?+

RockHoundR maps 1 spessartine rockhounding spots across 1 U.S. states. The top states are Colorado.

How much is spessartine worth?+

Typical asking prices fall in the range of $10-100 per gram for gem quality, $20-200 per specimen. Quality, size, and provenance can move individual specimens well outside that range.

What rocks look like spessartine?+

Spessartine is most often confused with Almandine, Grossular. A quick hardness test and a streak check separate the look-alikes faster than color alone.

What minerals are found with spessartine?+

Spessartine commonly co-occurs with Quartz, Microcline, Albite, Beryl, Tourmaline. Spotting any of these in float or country rock is a useful trip signal.

What kind of rock does spessartine form in?+

Spessartine typically forms in granite pegmatites, metamorphic rocks. Working float back to the host body is the standard way to chase a fresh occurrence.

What is spessartine used for?+

Spessartine is used in collector, gemstone, lapidary.

Find spessartine on the map

RockHoundR shows mapped rockhounding spots, access rules, and lets you log every find.