Citrine Quartz Geode Slice
Quartz var. Citrine · Semi-Precious Gemstone and Mineral Specimen
Crystal System
Trigonal, massive to crystalline habit within a cavity
Mineral Group
Silicates, specifically Tectosilicates
Chemical Formula
SiO2 with trace iron impurities
Formation Process
Hydrothermal and magmatic processes, forming within gas cavities in volcanic rocks via silica-rich mineral solutions over time
About This Crystal
A geode slice featuring a translucent to transparent yellow-to-golden core surrounded by an outer chalcedony and host rock rind. The central quartz crystals exhibit a vitreous luster and radial growth patterns.
Physical Characteristics
Yellow body color, white streak, conchoidal fracture, lack of distinct cleavage, specific gravity of approximately 2.65, brittle tenacity, and piezoelectric properties
Optical Properties
Singly refractive or uniaxial positive with low birefringence (0.009), vitreous luster, and no notable pleochroism
Hardness & Durability
Origin Region
Brazil, Uruguay, and Madagascar; typically found in volcanic basalt cavities
Hardness & Durability
Mohs hardness of 7, good durability for jewelry with no cleavage planes, though sensitive to extreme heat and prolonged direct sunlight
Care & Maintenance
Clean with warm soapy water and a soft brush, avoid ultrasonic cleaners if fractures are present, store away from direct sunlight to prevent color fading
Rarity & Value
Common to moderately rare depending on natural versus heat-treated origin; heavily heat-treated amethyst is common in the market, while naturally deep golden citrine commands higher values
Special Characteristics
Displays distinctive radial crystalline formations from a central point, vitreous crystal face reflections, and geode zoning
Lore & History
Historically known as the 'merchant's stone' for its association with wealth and abundance. Frequently linked in metaphysical practices to the Solar Plexus chakra for personal power, clarity, and manifestation, though these are traditional beliefs rather than scientific claims.