Rutilated Quartz
Quartz var. Rutilated Quartz · Semi-Precious Gemstone
Crystal System
Trigonal, with a typical macrocrystalline habit featuring prismatic hexagonal crystals terminating in pyramids
Mineral Group
Silicates
Chemical Formula
SiO2 with inclusions of TiO2
Formation Process
Hydrothermal and pegmatitic formation, where needle-like titanium dioxide minerals are trapped inside the host quartz during its crystallization process at elevated temperatures and pressures
About This Crystal
Transparent to translucent macrocrystalline quartz hosting distinct golden to reddish-brown needle-like inclusions of rutile, creating a striking internal visual pattern with a vitreous luster
Physical Characteristics
Color is clear with golden-yellow inclusions; streak is white; cleavage is absent; fracture is conchoidal; specific gravity is approximately 2.65; brittle tenacity; displays no significant magnetism
Optical Properties
Singly and doubly refractive with a refractive index of 1.544 to 1.553, low birefringence of 0.009, and vitreous optical luster with no notable pleochroism in the host quartz
Hardness & Durability
Origin Region
Brazil, Madagascar, Australia, USA, and Switzerland; typically forms in pegmatites and hydrothermal veins
Hardness & Durability
Mohs hardness of 7; good durability and suitable for most jewelry applications, though inclusions can create slight planes of structural weakness
Care & Maintenance
Clean with warm soapy water and a soft brush; avoid harsh chemicals, ultrasonic cleaners, and prolonged direct sunlight to preserve the clarity and prevent matrix damage
Rarity & Value
Common to uncommon; high-value specimens feature dense, parallel, or perfectly centered golden needles with high-clarity quartz host, ranging moderately in price
Special Characteristics
Features distinct needle-like rutile crystal inclusions often referred to poetically as Venus hair stone or Cupid's darts
Lore & History
Historically associated with illumination, spiritual growth, and vitality; traditionally used in crystal healing to cleanse energy fields and align the chakras, though these remain non-scientific, cultural beliefs