Astrophyllite is a rare, brittle, and typically dark brown-to-black silicate mineral known for its striking radiating, star-like bladed crystals, often showing bronze, blue, or golden flashes. Name-derived from Greek for "star leaf," this mineral forms in alkaline rocks. It is highly prized by collectors for its chatoyancy.
This stone is approximately 12 x 10 mm and is set into an adjustable sterling silver ring that will best fit sizes 6.5 - 8.5
