Aventurine and Citrine
Quartz var. Aventurine and Quartz var. Citrine · Semi-Precious Gemstones
Crystal System
Trigonal; specifically the hexagonal trapezohedral class. Habit in beads is massive/granular before being polished into spheres.
Mineral Group
Silicates (Tectosilicate subgroup)
Chemical Formula
SiO2 (Silicon Dioxide) with inclusions of Fuchsite (mica) in Aventurine and Iron impurities in Citrine.
Formation Process
Hydrothermal or Igneous; Aventurine forms as a quartzite rock during metamorphism or hydrothermal activity. Citrine forms through the crystallization of silica-rich fluids or heat treatment of Amethyst.
About This Crystal
The bracelet features translucent to opaque light green beads with a waxy to vitreous luster (Aventurine) and transparent to translucent golden-yellow to orange beads (Citrine).
Physical Characteristics
Color: Pale green and golden yellow; Streak: White; Cleavage: None (conchoidal fracture); Specific Gravity: 2.63–2.65; Luster: Vitreous to greasy.
Optical Properties
Refractive Index: 1.544–1.553; Birefringence: 0.009; Aventurine shows aventurescence (sparkly effect from mica). Citrine is weakly pleochroic.
Hardness & Durability
Origin Region
Aventurine: Primarily India, Brazil, and Russia. Citrine: Brazil, Madagascar, and Spain. Often found in hydrothermal veins and pegmatites.
Hardness & Durability
Mohs Hardness: 7; Toughness: Fair to Good. Highly durable for daily jewelry wear but can be scratched by Topaz or Sapphires.
Care & Maintenance
Clean with warm soapy water and a soft brush. Avoid prolonged exposure to direct sunlight for the Citrine beads as they may fade; avoid harsh chemicals.
Rarity & Value
Common; Aventurine is abundant and affordable. Citrine in this color is often heat-treated Amethyst, which is commercially common and inexpensive.
Special Characteristics
Aventurine displays 'aventurescence,' a shimmering effect caused by platy mineral inclusions. Citrine beads show varying color zoning from pale yellow to honey-orange.
Lore & History
Aventurine is historically known as a stone of luck and prosperity in various cultures. Citrine has been used in jewelry since the Hellenistic Age in Greece and is traditionally associated with abundance and the solar plexus chakra.