Rutilated Quartz
Quartz (Silica group) with Rutile inclusions · Semi-Precious Gemstone / Collector Mineral
Crystal System
Trigonal/Hexagonal; inclusions are Tetragonal needles. Tumbled form with massive habit visible.
Mineral Group
Silicates (Subgroup: Tectosilicate) with Oxide inclusions (Rutile).
Chemical Formula
SiO2 (Quartz) with TiO2 (Rutile) needles
Formation Process
Hydrothermal and Pegmatitic. High-temperature mineral solutions crystallize Quartz, trapping needle-like Rutile crystals during growth.
About This Crystal
Transparent to translucent clear or smoky quartz containing needle-like inclusions of rutile. These 'Venus hairs' appear golden or brownish. Vitreous luster.
Physical Characteristics
Color: Clear/Tan host with golden needles. Streak: White. Fracture: Conchoidal. Specific Gravity: ~2.65. Luminescence: Generally inert.
Optical Properties
Refractive Index: 1.544-1.553. Birefringence: 0.009. Singly refractive inclusions within a doubly refractive host. Rutile has metallic to adamantine luster.
Hardness & Durability
Origin Region
Notably Brazil (Minas Gerais), Madagascar, and various Alpine regions. Forms in pegmatites and hydrothermal veins.
Hardness & Durability
Mohs 7. Durable for most jewelry; toughness is fair to good depending on inclusion density. Stability is excellent.
Care & Maintenance
Safe with warm soapy water. Avoid ultrasonic or steam cleaners if inclusions reach the surface to prevent fractures. Store away from harder stones like Sapphire.
Rarity & Value
Common to Uncommon. Value is determined by inclusion clarity, 'hair' density, and pattern. Higher prices for dense, golden 'angel hair' patterns.
Special Characteristics
Distinctive acicular (needle-like) inclusions of Rutile. Can occasionally show asterism or chatoyancy if rutile density is extremely high.
Lore & History
Historically known as 'The Hair of Venus' or 'Cupid’s Arrows'. Traditionally used by healers to symbolize clarity and the integration of light into the physical body.