Guide
Heulandite specimens for sale
216 for sale · $22–$26,000 USD
405 in the gallery
Heulandite is a tectosilicate mineral that forms in vesicles and cavities within zeolite-bearing rocks. It typically occurs as tabular, prismatic crystals with a pearly to vitreous luster and a soft white to pale pink coloration, often seen in aggregates or fan-like sprays. Crystals can be twinned and occasionally demonstrate complex intergrowths with other zeolites, and the mineral commonly forms in zeolite-rich hydrothermal environments.
- Formula
- (Ca,Na)5(Si27Al9)O72 · 26H2O
- Rarity
- Common
- Stability
- Stable
- Collector interest
- Moderate Interest
- Classification notes
- Zeolite group; tectosilicate framework mineral
Key characteristics
- Crystal system
- monoclinic
- Mohs hardness
- 3.5–4
- Specific gravity
- 2.1–2.2
- Luster
- vitreous, pearly
- Transparency
- transparent, translucent
- Color
- colorless, white, gray, brown, red, orange, yellow, green, pink
- Streak
- white
- Cleavage
- perfect
- Fracture
- uneven
- Crystal habit
- tabular, prismatic, bladed, granular, massive
- Classic / historic
Buy Heulandite specimens
View all 216Where Heulandite is found
Top localities
- Nashik95 specimens
- Jalgaon57 specimens
- Jalgaon District47 specimens
- Madhya Pradesh14 specimens
- Upper New Street Quarry10 specimens
- Ahmednagar10 specimens
- Prospect Park Quarry8 specimens
- Aurangabad District7 specimens
- Maharashtra6 specimens
- Goble6 specimens
Guides
All guides
Guide
Heulandite from Nashik District, India
Heulandite — lustrous bladed to tabular crystals with pearly sheen in peach, pink, or green-included colors; forms in Deccan Traps vesicles, Nashik District.Read guide
Guide
Heulandite from Jalgaon District, India
Jalgaon District, India - Heulandite from Savda/Sawda quarries prized for luster, sculptural crystals, peach-to-pink colors, and Deccan Trap paragenesis.Read guideAbout Heulandite
Some of the most productive specimens have come from zeolite-bearing deposits in India, the United States, Iceland, Canada, and Australia, where crystallization during low-temperature hydrothermal processes yields well-formed, sizable crystals. Collectors prize Heulandite for its crisp faces, pleasing translucency, and the way the mineral patterns with related zeolites in mixed varieties. Though not as rare as some companion species, exceptionally well-formed crystals with sharp terminations and rich color remain a sought-after highlight in a cabinet of minerals.
