Green Aventurine and Quartz
Quartz var. Aventurine / Calcite (Travertine/Onyx variety) · Decorative Stone and Mineral Specimen
Crystal System
Trigonal (Quartz)
Mineral Group
Silicates
Chemical Formula
SiO2 (Quartz) with Cr-rich mica or Fuchsite inclusions
Formation Process
Hydrothermal and metamorphic formation in quartz veins and pegmatites
About This Crystal
The specimen appears to be a composite or carved decorative object consisting of a translucent greenish-yellow banded stone (likely onyx-marble or banded calcite/quartz) mounted on a vibrant green base (green aventurine or dyed stone).
Physical Characteristics
Hardness varies depending on the specific mineral component (7 for quartz, 3 for calcite). Displays a waxy to vitreous luster with distinct banding and translucency.
Optical Properties
Biaxial or uniaxial positive depending on the component minerals, translucent with non-pleochroic behavior.
Hardness & Durability
Origin Region
India, Brazil, Russia
Hardness & Durability
Mohs hardness ranges from 3 for the carbonate base portion up to 7 for the quartz upper portion, making it moderately durable but sensitive to acids if carbonates are present.
Care & Maintenance
Clean with mild soap and warm water. Avoid harsh chemical cleaners, prolonged sun exposure, and acidic substances.
Rarity & Value
Common, widely available as tumbled stones, carvings, and decorative desk items with low to moderate commercial value.
Special Characteristics
Features visible color banding and light transmission through the translucent upper dome portion.
Lore & History
Often utilized in modern crystal healing as a stone of prosperity, good luck, and heart chakra alignment, though these are traditional beliefs rather than scientific claims.