Chrysotile is a fibrous mineral belonging to the serpentine group, often recognized by its flexible, thread-like strands. It is typically found in serpentinized ultramafic rocks where it forms cross-fiber veins, though it is critically dangerous to handle due to respiratory health risks from loose fibers.
Is this chrysotile asbestos?
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 chrysotile asbestos with a known reference. Chrysotile Asbestos sits at Mohs 2.5-3 — softer than the next harder reference, harder than the previous one.
- 2Check the streakDrag the specimen across an unglazed porcelain plate. Chrysotile Asbestos leaves a white streak.
- 3Read the lusterHold the specimen under a strong light. Chrysotile Asbestos typically shows a silky luster.
- 4Match the color rangeCompare against the expected color range: white, gray, green, yellow.
- 5Look at form & habitCrystal system: monoclinic. Typical habit: fibrous.
Often confused with
Chrysotile Asbestos vs. its common look-alikes — and how to tell them apart in the field.
How to tell apart: Tremolite is the harder of the two (Mohs 5-6 vs. 2.5-3); luster reads silky on Chrysotile Asbestos and vitreous on Tremolite.
How to tell apart: Luster reads silky on Chrysotile Asbestos and greasy on Antigorite.
Often found alongside chrysotile asbestos
Minerals reported to co-occur with chrysotile asbestos. Spotting these in float or country rock is a strong cue you are in the right ground.
All properties
- Chemical formula
- Mg₃Si₂O₅(OH)₄
- Mohs hardness
- 2.5-3
- Density
- 2.53-2.55 g/cm³
- Streak
- White
- Luster
- Silky
- Transparency
- Translucent
- Crystal system
- Monoclinic
- Crystal habit
- Fibrous
- Cleavage
- Perfect
- Rarity
- Common
- Uses
- Collector
- Host rock
- Ultramafic Rocks and Serpentinites
- Typical price
- $10-50 per specimen
Where rockhounds find chrysotile asbestos
1 mapped spotsClassic worldwide localities
- Quebec, Canada
- Asbest, Russia
- Val Malenco, Italy
- Arizona, USA
Field-hunting tip
Look in ultramafic rocks and serpentinites country — that is the host setting where chrysotile asbestos typically forms. If you start seeing magnetite, chromite, dolomite in float, you are in the right ground. Field specimens usually show a fibrous habit, so train your eye for that shape before scanning the outcrop. In the U.S., the densest reported localities are in New York — start trip planning there.
Common questions
How do you identify chrysotile asbestos?+
Where is chrysotile asbestos found?+
Can I find chrysotile asbestos in the United States?+
How much is chrysotile asbestos worth?+
Is chrysotile asbestos safe to handle?+
What rocks look like chrysotile asbestos?+
What minerals are found with chrysotile asbestos?+
What kind of rock does chrysotile asbestos form in?+
What is chrysotile asbestos used for?+
Find chrysotile asbestos on the map
RockHoundR shows mapped rockhounding spots, access rules, and lets you log every find.
