PREHNITE SPHERES

Prehnite is a translucent to transparent mineral most commonly found in shades of pale to yellowish green, though it can also appear white, gray, or colorless. It typically forms in botryoidal, globular, or crystalline shapes and displays a vitreous to pearly luster. Chemically, it is a calcium aluminum silicate hydroxide and is frequently found alongside zeolites in the cavities of volcanic rocks. With a Mohs hardness of 6 to 6.5, prehnite occurs in various regions around the world, including South Africa, Australia, China, and the United States.