Tangerine Quartz
Quartz var. Hematoid Quartz · Mineral Specimen and Semi-Precious Gemstone
Crystal System
Trigonal system, prismatic crystal habit with pyramidal terminations
Mineral Group
Silicates, specifically Tectosilicates
Chemical Formula
SiO2 with iron oxide inclusions (Fe2O3)
Formation Process
Hydrothermal formation where water solutions rich in silica and iron oxide deposit minerals into cavities within rock at moderate temperatures and pressures
About This Crystal
A small, raw, doubly terminated or fragment crystal showcasing a vibrant orange-to-rusty-brown coloration due to external or internal hematite and iron oxide staining on milky-to-clear quartz. The luster is vitreous to greasy, and transparency ranges from translucent to opaque at the iron-heavy sections.
Physical Characteristics
Color ranges from white and clear to bright orange and reddish-brown; white streak; no cleavage; conchoidal fracture; specific gravity of approximately 2.65; brittle tenacity; exhibits piezoelectricity and can show weak greenish-yellow fluorescence under shortwave UV due to impurities.
Optical Properties
Singly refractive optically anomalous uniaxial positive, refractive index of 1.544 to 1.553, low birefringence of 0.009, no significant pleochroism.
Hardness & Durability
Origin Region
Found globally; notable deposits in Minas Gerais, Brazil, and Madagascar in pegmatites and hydrothermal veins
Hardness & Durability
Mohs hardness of 7, making it durable and suitable for general jewelry use, though the raw point has sharp edges and is somewhat brittle due to internal fractures.
Care & Maintenance
Easy to care for; clean with warm soapy water and a soft brush. Avoid harsh chemical acids and prolonged direct sunlight if color stability is a concern, though iron oxide coatings are generally stable.
Rarity & Value
Common to uncommon depending on color saturation and crystal perfection. Inexpensive as raw mineral specimens, valued more for aesthetic appearance or metaphysical use.
Special Characteristics
Iron oxide (hematite/limonite) coating or phantom inclusions trapped beneath or on the crystal faces, giving the distinctive tangerine or fiery orange color.
Lore & History
Often associated with the sacral chakra, traditionally believed to boost creativity, vitality, and passion. Historically, vibrant colored quartz varieties have been utilized across cultures for amulets and spiritual alignment.