Both stilbite and heulandite are members of the tectosilicate group and fall under the group of zeolites. The key difference between stilbite and heulandite is that stilbite can occur in monoclinic, triclinic, and orthorhombic crystal systems, whereas heulandite occurs in a monoclinic crystal system. This specimen was excavated in the Maharashtra region of India.
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125x80x80mm, 620kg approx