Stilbite is a zeolite mineral composed of hydrated calcium sodium aluminum silicate. It commonly forms in sheaf-like, fibrous, or tabular crystal structures and is typically found in shades of white, pink, orange, yellow, or peach. Stilbite has a Mohs hardness of 3.5 to 4, making it relatively soft and best suited for mineral collections rather than jewelry. It is often found in basaltic volcanic rocks and is commonly sourced from India, Iceland, the United States, and Canada.