Green Sea Glass
Amorphous Silicon Dioxide (Man-made Glass) · Decorative / Coastal Collectible
Crystal System
Amorphous (Non-crystalline)
Mineral Group
Man-made Silicate Product
Chemical Formula
SiO2 with various oxides (Na2O, CaO)
Formation Process
Anthropogenic origin, weathered and tumbled naturally by wave action in marine environments
About This Crystal
A small, tumbled fragment of green glass with a frosted, smooth surface texture, rounded edges, and high transparency showing internal light reflections.
Physical Characteristics
Green body color, white streak if powdered, no cleavage, conchoidal fracture, specific gravity approximately 2.4-2.8, brittle tenacity
Optical Properties
Isotropic (singly refractive), vitreous to frosted luster, no pleochroism
Hardness & Durability
Origin Region
Found worldwide along ocean beaches and lake shores
Hardness & Durability
Mohs hardness of 5.5, moderate durability, suitable for wire-wrapping but vulnerable to chipping under high impact
Care & Maintenance
Wash with warm soapy water and a soft brush; store separately to prevent scratching softer materials
Rarity & Value
Common, value is negligible to low, primarily valued for coastal crafts and jewelry making
Special Characteristics
Frosted patina caused by prolonged abrasion by sand and water in a marine environment
Lore & History
Often associated with coastal magic, transformation, healing, and the element of water in modern crystal lore, though it is fundamentally a human-made material