Blue Goldstone
Synthetic Glass with Metallic Copper Inclusions · Decorative Stone / Synthetic Gemstone
Crystal System
Amorphous (Man-made glass)
Mineral Group
Man-Made Glass / Synthetic
Chemical Formula
SiO2 with Cu inclusions
Formation Process
Synthetic/man-made through a controlled chemical reduction process in a furnace melting silica, copper oxide, and other metallic elements
About This Crystal
Tumbled, smooth, and rounded block displaying a deep dark blue or blackish-blue body color densely speckled with shimmering, reflective points of metallic copper crystals that create a glittering night-sky appearance
Physical Characteristics
Dark blue to purplish-blue body with metallic copper flecks, white streak, no cleavage, conchoidal fracture typical of glass, specific gravity around 2.4 to 2.6, brittle tenacity, non-magnetic
Optical Properties
Singly refractive, isotropic glass with metallic aventurescence caused by suspended copper crystals reflecting light
Hardness & Durability
Origin Region
Manufactured globally, primarily in Italy, China, and India
Hardness & Durability
Mohs hardness of 5.5 to 6, moderate durability, sensitive to thermal shock and scratching due to glass composition
Care & Maintenance
Clean with warm soapy water and a soft cloth, avoid ultrasonic cleaners, harsh chemicals, and prolonged exposure to extreme heat or hard impacts
Rarity & Value
Very common and inexpensive as it is entirely man-made, widely available in various tumbled and carved shapes
Special Characteristics
Features strong aventurescence, giving it a characteristic glittering or sparkly night-sky optical effect due to suspended metallic copper crystals
Lore & History
Often associated with ambition, vitality, and learning in modern crystal healing, though it has no historical mineralogical significance due to its artificial origin created in seventeenth-century Venice