1.5" Green Heulandite Crystal Cluster - India

This is a cluster of green heulandite crystals from the Deccan Traps (the world largest basalt flow) in India. The inclusions within these heulandite crystals are moss-like.

Heulandite is a mineral of the zeolite group that also fits within the silicate and tectosilicates groups. It has the general chemical formula (Ca,Na)2-3Al3(Al,Si)2Si13O36 · 12H2O, but the calcium and sodium can be substituted by potassium, barium, or strontium ions. Heulandite crystals will often form as distinctive tabular, radiating crystals with a vitreous luster, and can display a variety of colors including white, green, brown, orange, red, pink, yellow, grey, and black.
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DETAILS
SPECIES
Heulandite
LOCATION
India
SIZE
1.5" wide
CATEGORY
ITEM
#168967