Native sulfur is widely recognized by its vibrant yellow color and distinct resinous luster. It forms frequently in volcanic environments around fumaroles or within sedimentary evaporite beds associated with gypsum and halite.
Is this native sulfur?
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 native sulfur with a known reference. Native Sulfur sits at Mohs 1.5-2.5 — softer than the next harder reference, harder than the previous one.
- 2Check the streakDrag the specimen across an unglazed porcelain plate. Native Sulfur leaves a white streak.
- 3Read the lusterHold the specimen under a strong light. Native Sulfur typically shows a resinous luster.
- 4Match the color rangeCompare against the expected color range: yellow, yellow-orange, yellow-green, brown.
- 5Look at form & habitCrystal system: orthorhombic. Typical habit: bipyramidal crystals, earthy, massive, encrusting.
Often confused with
Native Sulfur vs. its common look-alikes — and how to tell them apart in the field.
How to tell apart: Streak differs — Native Sulfur leaves white, Orpiment leaves yellow.
How to tell apart: Streak differs — Native Sulfur leaves white, Greenockite leaves brick-red to orange-yellow; luster reads resinous on Native Sulfur and adamantine to resinous on Greenockite.
How to tell apart: Sphalerite is the harder of the two (Mohs 3.5-4 vs. 1.5-2.5); streak differs — Native Sulfur leaves white, Sphalerite leaves white to yellow-brown; luster reads resinous on Native Sulfur and resinous to submetallic on Sphalerite.
Often found alongside native sulfur
Minerals reported to co-occur with native sulfur. Spotting these in float or country rock is a strong cue you are in the right ground.
All properties
- Chemical formula
- S
- Mohs hardness
- 1.5-2.5
- Density
- 2.0-2.1 g/cm³
- Streak
- White
- Luster
- Resinous
- Transparency
- Translucent
- Crystal system
- Orthorhombic
- Crystal habit
- Bipyramidal Crystals, Earthy, Massive, Encrusting
- Cleavage
- Poor
- Rarity
- Common
- Uses
- Collector, Industrial
- Host rock
- Volcanic Fumaroles, Sedimentary Evaporite Deposits
- Typical price
- $5-50 for small specimens, up to $200 for aesthetic crystals
Where rockhounds find native sulfur
Classic worldwide localities
- Sicily, Italy
- Poland
- Japan
- USA
- Mexico
Field-hunting tip
Look in volcanic fumaroles, sedimentary evaporite deposits country — that is the host setting where native sulfur typically forms. If you start seeing gypsum, aragonite, celestine in float, you are in the right ground. Field specimens usually show a bipyramidal crystals, earthy, massive, encrusting habit, so train your eye for that shape before scanning the outcrop.
Common questions
How do you identify native sulfur?+
Where is native sulfur found?+
How much is native sulfur worth?+
What rocks look like native sulfur?+
What minerals are found with native sulfur?+
What kind of rock does native sulfur form in?+
What is native sulfur used for?+
Find native sulfur on the map
RockHoundR shows mapped rockhounding spots, access rules, and lets you log every find.
