Helvine is a beryllium-bearing silicate often found in tetrahedral crystal form within skarns or pegmatites. Collectors should look for its distinct tetrahedral habit and characteristic yellow to reddish-brown coloration, frequently confirmed by its orange-red fluorescence under shortwave UV light.
Is this helvine?
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 helvine with a known reference. Helvine sits at Mohs 6-6.5 — softer than the next harder reference, harder than the previous one.
- 2Check the streakDrag the specimen across an unglazed porcelain plate. Helvine leaves a white streak.
- 3Read the lusterHold the specimen under a strong light. Helvine typically shows a vitreous luster.
- 4Match the color rangeCompare against the expected color range: yellow, yellowish-brown, reddish-brown, green.
- 5Look at form & habitCrystal system: cubic. Typical habit: tetrahedral crystals, massive, granular.
Often confused with
Helvine vs. its common look-alikes — and how to tell them apart in the field.
How to tell apart: Helvine is noticeably harder (Mohs 6-6.5 vs. 3.5-4); streak differs — Helvine leaves white, Sphalerite leaves white to yellow-brown; luster reads vitreous on Helvine and resinous to submetallic on Sphalerite.
Often found alongside helvine
Minerals reported to co-occur with helvine. Spotting these in float or country rock is a strong cue you are in the right ground.
All properties
- Chemical formula
- (Be,Mn,Fe)₄Be₃(SiO₄)₃S
- Mohs hardness
- 6-6.5
- Density
- 3.16-3.36 g/cm³
- Streak
- White
- Luster
- Vitreous
- Transparency
- Translucent
- Crystal system
- Cubic
- Crystal habit
- Tetrahedral Crystals, Massive, Granular
- Cleavage
- Poor On (111)
- Fluorescence
- Often Orange-red Under SW UV
- Rarity
- Uncommon
- Uses
- Collector, Geological Study
- Host rock
- Metasomatic Zones, Skarns, Nepheline Syenites, Granite Pegmatites
- Typical price
- $20-200 thumbnail
Where rockhounds find helvine
Classic worldwide localities
- Sweden
- Norway
- USA
- Russia
- Canada
Field-hunting tip
Look in metasomatic zones, skarns, nepheline syenites, granite pegmatites country — that is the host setting where helvine typically forms. If you start seeing garnet, fluorite, magnetite in float, you are in the right ground. Field specimens usually show a tetrahedral crystals, massive, granular habit, so train your eye for that shape before scanning the outcrop.
Common questions
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Find helvine on the map
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