Steatite is a massive, metamorphic form of talc prized for its extreme softness and smooth, soap-like feel. It is easily carved with simple hand tools and is commonly found in altered ultramafic rocks where hydrothermal activity has been present.
Is this steatite?
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 steatite with a known reference. Steatite sits at Mohs 1 — softer than the next harder reference, harder than the previous one.
- 2Check the streakDrag the specimen across an unglazed porcelain plate. Steatite leaves a white streak.
- 3Read the lusterHold the specimen under a strong light. Steatite typically shows a pearly luster.
- 4Match the color rangeCompare against the expected color range: gray, green, white, brown.
- 5Look at form & habitCrystal system: monoclinic. Typical habit: massive.
Often confused with
Steatite vs. its common look-alikes — and how to tell them apart in the field.
Often found alongside steatite
Minerals reported to co-occur with steatite. Spotting these in float or country rock is a strong cue you are in the right ground.
All properties
- Chemical formula
- Mg₃Si₄O₁₀(OH)₂
- Mohs hardness
- 1
- Density
- 2.6-2.8 g/cm³
- Streak
- White
- Luster
- Pearly
- Transparency
- Translucent
- Crystal system
- Monoclinic
- Crystal habit
- Massive
- Cleavage
- Perfect
- Rarity
- Common
- Uses
- Sculpture, Industrial, Decorative, Refractory Material
- Host rock
- Metamorphic
- Typical price
- $5-50 for small carvings or specimens
Where rockhounds find steatite
5 mapped spotsClassic worldwide localities
- USA
- Finland
- Brazil
- India
- Canada
Field-hunting tip
Look in metamorphic country — that is the host setting where steatite typically forms. If you start seeing magnesite, chlorite, dolomite in float, you are in the right ground. Field specimens usually show a massive habit, so train your eye for that shape before scanning the outcrop. In the U.S., the densest reported localities are in Maryland, North Carolina, Alabama — start trip planning there.
Common questions
How do you identify steatite?+
Where is steatite found?+
Can I find steatite in the United States?+
How much is steatite worth?+
What rocks look like steatite?+
What minerals are found with steatite?+
What kind of rock does steatite form in?+
What is steatite used for?+
Find steatite on the map
RockHoundR shows mapped rockhounding spots, access rules, and lets you log every find.
