Guide
Prehnite specimens for sale
84 for sale · $40–$7,500 USD
714 in the gallery
Prehnite is a calcium aluminum silicate that commonly forms in low-temperature hydrothermal veins and as secondary mineral in basaltic environments. It typically appears as pale green to yellow-green crystals or botryoidal masses with a glassy to pearly lustre, and may form in radiating, chunky, or botryoidal habits that catch light with a soft glow. Fine specimens are sought from classic locales where hydrothermal activity and basaltic rock interactions have driven mineral growth, yielding appreciable crystals and compact, oozy aggregates.
- Formula
- Ca2Al2Si3O10(OH)2
- Rarity
- Common
- Stability
- Stable
- Collector interest
- Moderate Interest
- Classification notes
- Phyllosilicate; prehnite group, Strunz 9.DP.20
Key characteristics
- Crystal system
- orthorhombic
- Mohs hardness
- 6–6.5
- Specific gravity
- 2.8–2.95
- Luster
- vitreous, pearly
- Transparency
- transparent, translucent
- Color
- colorless, white, gray, yellow, green
- Streak
- white
- Cleavage
- good
- Fracture
- uneven
- Crystal habit
- prismatic, tabular, botryoidal, stalactitic, granular, massive
- Gem mineral
- Classic / historic
Buy Prehnite specimens
View all 84Where Prehnite is found
Top localities
- Prospect Park Quarry55 specimens
- Jeffrey Mine32 specimens
- Mumbai27 specimens
- Upper New Street Quarry26 specimens
- Diakon25 specimens
- Sadiola Hill23 specimens
- Merelani Hills20 specimens
- Fanwood Quarry18 specimens
- Goboboseb Mountains18 specimens
- Sandaré17 specimens
Guides
All guides
Guide
Prehnite from Prospect Park Quarry, New Jersey, USA
Prospect Park Quarry, New Jersey, USA - prehnite famed for apple- to mint-green, translucent botryoidal forms, hollow casts, and standout collector appeal.Read guide
Guide
Prehnite from Merelani Hills, Tanzania
Merelani Hills prehnite, Tanzania: glossy translucent crystals on black graphite, lemon-to-mint colors, and a prized locality with context for collectors.Read guideAbout Prehnite
Notable specimens come from regions in the United States and Africa, with several well-known deposits producing sizable, well-formed crystals and pleasing color. Collectors prize Prehnite for its subtle green hues, tactile botryoidal forms, and the way it pairs well with associated minerals such as zeolites and other low-temperature minerals. Its relatively approachable hardness and pleasing texture make it a staple in display cabinets and collections focused on minerals from hydrothermal settings and basalt-related environments.
