metamorphic
Orange Aventurine (Sunstone-style Quartzite)
Silicon Dioxide (SiO2) with Goethite or Hematite inclusions
Hardness: 6.5-7 (Mohs scale); Color: Orange, peach, or reddish-brown; Luster: Vitreous to greasy; Crystal Structure: Trigonal (microcrystalline); Cleavage: Uneven/conchoidal fracture; Specific gravity: 2.64-2.69
- Hardness
- 6
- Color
- Orange, peach, or reddish-brown
- Luster
- Vitreous to greasy
Identified More metamorphic →
Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 6.5-7 (Mohs scale); Color: Orange, peach, or reddish-brown; Luster: Vitreous to greasy; Crystal Structure: Trigonal (microcrystalline); Cleavage: Uneven/conchoidal fracture; Specific gravity: 2.64-2.69
Formation & geological history
Formed through the regional metamorphism of quartz-rich sandstone. The distinct color and 'aventurescence' (shimmer) are created by platy inclusions of minerals like hematite or goethite during high-pressure crystallization in metamorphic belts.
Uses & applications
Primarily used in the jewelry industry for beads, cabochons, and tumbled stones. it is also popular in ornamental carvings, feng shui decor, and as a 'healing crystal' in metaphysical practices.
Geological facts
While often confused with Sunstone (a feldspar), Aventurine is a variety of Quartz. The term 'aventurescence' comes from the Italian word 'a ventura,' meaning 'by chance,' referring to the accidental discovery of goldstone glass in the 18th century which looks similar.
Field identification & locations
Identify in the field by its grainy, sugary texture and characteristic metallic glint under sunlight. It is commonly found in India, Brazil, Russia, and Tanzania. Collectors should look for a uniform orange hue and strong internal reflections.
More like this
