Effenbergerite is an exceptionally rare barium copper silicate known for its vibrant, intense blue color that resembles synthetic pigments like Egyptian Blue. It is found primarily as small, thin platy crystals within the manganese-rich environments of the Kalahari Manganese Field. Due to its scarcity and striking aesthetic, it is highly sought after by serious mineral collectors.
Is this effenbergerite?
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 effenbergerite with a known reference. Effenbergerite sits at Mohs 3.5 — softer than the next harder reference, harder than the previous one.
- 2Check the streakDrag the specimen across an unglazed porcelain plate. Effenbergerite leaves a white streak.
- 3Read the lusterHold the specimen under a strong light. Effenbergerite typically shows a vitreous luster.
- 4Match the color rangeCompare against the expected color range: blue, intense blue.
- 5Look at form & habitCrystal system: tetragonal. Typical habit: tabular crystals, platy.
Often confused with
Effenbergerite vs. its common look-alikes — and how to tell them apart in the field.
Often found alongside effenbergerite
Minerals reported to co-occur with effenbergerite. Spotting these in float or country rock is a strong cue you are in the right ground.
All properties
- Chemical formula
- BaCuSi₄O₁₀
- Mohs hardness
- 3.5
- Density
- 3.32 g/cm³
- Colors
- Streak
- White
- Luster
- Vitreous
- Transparency
- Transparent
- Crystal system
- Tetragonal
- Crystal habit
- Tabular Crystals, Platy
- Cleavage
- Perfect On {001}
- Rarity
- Rare
- Uses
- Collector
- Host rock
- Manganese Ore Deposits
- Typical price
- $100-500 thumbnail, $500+ specimens
Where rockhounds find effenbergerite
Classic worldwide localities
- Kalahari Manganese Field, South Africa
Field-hunting tip
Look in manganese ore deposits country — that is the host setting where effenbergerite typically forms. If you start seeing hausmannite, baryte, calcite in float, you are in the right ground. Field specimens usually show a tabular crystals, platy habit, so train your eye for that shape before scanning the outcrop.
Common questions
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Find effenbergerite on the map
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