Indian Brinaite stone, 58.039 carats

Technical details: Type: Prehnite (Prehnite) Weight: 58.039 carats Dimensions (mm): 44.00x20.81x6.61 Shape: Oval Color: Dark green Clarity: Eye clean Transparency: Opaque Hardness: 6.0-6.5 Treatment: Untreated Origin: India Certification: Laboratory certificate (MT) Saudi Arabia - Website (www.mtgl.com.sa) Prehnite is a calcium aluminum silicate mineral. This stone is known for its light yellowish-green or apple green color, and it may sometimes appear white, gray, or yellow. Prehnite features a vitreous to greasy luster, often forming in botryoidal or nodular aggregates with smooth, rounded surfaces, or as small mosaic crystals. Prehnite is usually found as a secondary mineral in cavities and cracks within basic igneous rocks such as basalt and diabase, and is often associated with other minerals like zeolites and calcite.