$105Median
19Sold (12 mo)
$25Last sale
Laumontite specimens for sale
6 for sale · $140–$1,500 USD
78 in the gallery
Laumontite is a hydrated aluminosilicate mineral that forms distinct, tabular to prismatic crystals and often occurs as aggregates in vesicular volcanic rocks. It typically presents a color range from colorless to pale white, yellow, or pinkish hues, with a vitreous to pearly luster that can highlight its well-formed crystal faces. Common habit includes slender prisms and plate-like crystals that can build delicate clusters, sometimes filling cavities in basalt and other volcanic rocks.
- Formula
- CaAl2Si4O12 · 4H2O
- Rarity
- Common
- Stability
- Stable
- Collector interest
- Moderate Interest
- Classification notes
- Framework silicate (tectosilicate); Zeolite group
Key characteristics
- Crystal system
- monoclinic
- Mohs hardness
- 3.5–4
- Specific gravity
- 2.23–2.41
- Luster
- vitreous, pearly
- Transparency
- transparent, translucent
- Color
- colorless, white, gray, yellow, pink
- Streak
- white
- Cleavage
- perfect
- Fracture
- uneven
- Crystal habit
- prismatic, acicular, fibrous, radiating, massive
- Classic / historic
Buy Laumontite specimens
View all 6Where Laumontite is found
Top localities
- Prospect Park Quarry6 specimens
- Himalaya Mine4 specimens
- Jalgaon District2 specimens
- Malad Quarry2 specimens
- Merelani Hills2 specimens
- Mitchell2 specimens
- Upper New Street Quarry2 specimens
- India1 specimen
- Aurangabad District1 specimen
- Banská Štiavnica1 specimen
About Laumontite
Collectors prize laumontite for its crisp crystal geometry and the variety of localities that produce well-crystallized specimens. Notable specimens come from classic mining areas around the world, including districts in the USA, India, the UK, China, and Russia, where the mineral can be found in zeolite-rich deposits and as secondary mineral from alteration of feldspars. The appeal lies in its rarity of perfect terminations, the contrast of color against white matrix, and the way it records hydrothermal conditions from which it formed.
