Goslarite specimens for sale
4 for sale · $115–$1,000 USD
3 in the gallery
Goslarite is a hydrated zinc sulfate, ZnSO4·7H2O, recognized by its orthorhombic crystal system and vitreous luster. It commonly forms slender, acicular crystals as well as massive or stalactitic aggregates, and it can appear colorless or take on brown, green, or blue tints. The mineral’s hardness is on the softer side, around 2 to 2.5 on the Mohs scale, and it has a white streak with perfect cleavage and a conchoidal fracture, making crisp terminations a hallmark of well-formed specimens.
- Formula
- ZnSO4·7(H2O)
- Classification notes
- Hydrated Acid and Sulfates
Key characteristics
- Crystal system
- orthorhombic
- Mohs hardness
- 2–2.5
- Specific gravity
- 2
- Luster
- vitreous
- Transparency
- transparent, translucent
- Color
- colorless, brown, green, blue
- Streak
- white
- Cleavage
- perfect
- Fracture
- conchoidal
- Crystal habit
- acicular, massive, stalactitic
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About Goslarite
Historically significant sources include German localities, with Goslar being a prominent mind. Specimens from such environments often exhibit well-defined crystals or striking crystalline sprays, appreciated for their delicate form and bright luster. Collectors value Goslarite for its transparency and the way light interacts with its hydrated composition, sometimes revealing subtle color when exposed to specific simple mineral associations. Its relative rarity in certain crystal sizes adds a layer of interest for species-focused collections, contributing to a well-rounded display alongside other hydrated sulfates.