Green Drusy Heulandite Mineral Specimen (#1050) metallic luster copper mineral specimen often forming needle-like structures within

often forming needle-like structures within the rock's vesicles(gas bubbles) left behind during cooling

Approximate Size: 4

Large Pyrite Qubes with Quartz from Peru

Many specimens also contain trace amounts of uranium

Green Drusy Heulandite Mineral Specimen (#1050) metallic luster copper mineral specimen often forming needle-like structures withinApproximate Size: 2 inches Green Drusy Heulandite mineral specimen. Location: Aurangabad Maharashtra, India. Facts: Heulandite has a sheet like open framework structure, classified as a tectosilicate, where it's structure is composed of interconnected six membered rings of silicate tetrahedra, creating channels within the crystal that allow it to act as a Zeolite, capable of exchanging cation like sodium, calcium, and potassium within its structure.