$38Median
2Sold (12 mo)
$45Last sale
Gmelinite specimens for sale
1 for sale · $150 USD
9 in the gallery
Gmelinite is a hydrous aluminosilicate of the zeolite group. It forms colorless to white crystals that are typically transparent to translucent, often presenting a vitreous to pearly luster. Crystals commonly occur as well-formed shapes in zeolite-rich cavities, sometimes displaying a fibrous or tabular habit, and may occur in aggregates that emphasize their geometric faces.
- Formula
- Ca2(Si8Al4)O24 · 11H2O
- Rarity
- Common
- Stability
- Stable
- Collector interest
- Moderate Interest
- Classification notes
- Silicates; Tektosilicates; Zeolites (framework silicates)
Key characteristics
- Crystal system
- hexagonal
- Mohs hardness
- 4.5–5
- Specific gravity
- 2.04–2.17
- Luster
- vitreous
- Transparency
- transparent, translucent
- Color
- colorless, white, gray, yellow, pink, red, green
- Streak
- white
- Cleavage
- distinct
- Fracture
- uneven
- Crystal habit
- rhombohedral, tabular, prismatic, granular, massive
- Classic / historic
Buy Gmelinite specimens
View all 1Where Gmelinite is found
Top localities
- Paterson1 specimen
About Gmelinite
Notable localities include Canada, Kazakhstan, the United States, and Australia, where gmelinite-bearing zeolite assemblages fill volcanic or sedimentary hosts. In these environments, it is often found alongside other zeolites in vesicles and fractures, contributing to the characteristic porous, open-framework textures of its host rocks.
Collectors value gmelinite for its clear or pale crystals, its association with classic zeolite suites, and the aesthetic of well-formed specimens. Its transparent to translucent crystals set against contrasting minerals can offer attractive display pieces, and its occurrence in diverse localities makes for a rewarding collecting niche for zeolite enthusiasts.
