Goldstone (Red)
Man-made glass containing metallic copper inclusions · Decorative Stone / Synthetic Gemstone
Crystal System
Amorphous (Non-crystalline glass)
Mineral Group
Artificial Silicate Glass
Chemical Formula
SiO2 (glass matrix) + Cu (copper metal inclusions)
Formation Process
Synthetic man-made process involving the melting of silica, copper oxide, and other metal oxides in a reducing atmosphere to precipitate metallic copper crystals.
About This Crystal
A tumbled, polished smooth specimen of reddish-brown glass densely packed with glittering, microscopic metallic copper crystals that give it a brilliant spangled appearance, commonly known as aventurescence.
Physical Characteristics
Reddish-brown body color with metallic copper glitter, white streak, amorphous form with no cleavage, conchoidal fracture, specific gravity around 2.4 - 2.6, brittle tenacity, non-magnetic.
Optical Properties
Isotropic (singly refractive) glass matrix with high luster reflection from internal metallic copper platelets creating strong aventurescence.
Hardness & Durability
Origin Region
Manufactured primarily in Italy, China, and India
Hardness & Durability
Mohs hardness of 5.5 to 6, relatively low toughness due to glass composition, sensitive to thermal shock and harsh chemicals.
Care & Maintenance
Clean with warm soapy water and a soft cloth, avoid ultrasonic cleaners, harsh chemicals, and sudden temperature changes. Store separately to prevent scratching softer materials.
Rarity & Value
Common and inexpensive, mass-produced as an ornamental material for jewelry and decorative carvings.
Special Characteristics
Displays strong aventurescence due to the suspended reflective metallic copper crystals suspended within the glass matrix.
Lore & History
Invented in 17th-century Venice (Murano) by the Miotti family through an accidental discovery. In modern metaphysical practices, Red Goldstone is associated with vitality, drive, confidence, and the sacral chakra, though these are strictly traditional beliefs.