Lemon Quartz
Quartz var. Lemon Quartz (IMA: Quartz) · Semi-Precious Gemstone / Mineral Specimen
Crystal System
Trigonal system, typically forming prismatic crystals, masses, or as in this specimen, an irregular rough crystal fragment with micro-crystalline texture.
Mineral Group
Silicates, specifically the Tectosilicate subgroup.
Chemical Formula
SiO2
Formation Process
Hydrothermal and magmatic processes, precipitating from silica-rich solutions at varying temperatures and pressures within crustal cavities and veins.
About This Crystal
A small, translucent to transparent pale yellow-green rough crystal fragment. It exhibits a vitreous to greasy luster, irregular fracture surfaces, and a subtle yellowish-lime tint characteristic of irradiated or naturally tinted quartz.
Physical Characteristics
Color is pale yellow-green; streak is white; no distinct cleavage; conchoidal fracture; specific gravity is approximately 2.65; brittle tenacity; displays strong piezoelectric properties.
Optical Properties
Singly or uniaxially positive doubly refractive; refractive index ranges from 1.544 to 1.553; low birefringence of 0.009; typically non-pleochroic or very weakly pleochroic in treated varieties.
Hardness & Durability
Origin Region
Found globally; notable sources for quartz include Brazil, Madagascar, the United States, and the Alps. Typically forms in pegmatites, hydrothermal veins, and metamorphic rocks.
Hardness & Durability
Mohs hardness of 7; good durability and wearability for jewelry use, though brittle under sharp impacts due to conchoidal fracture.
Care & Maintenance
Safe to clean with warm soapy water; avoid harsh chemicals and sudden extreme temperature changes; store separately from harder stones like corundum or diamond to prevent scratching.
Rarity & Value
Common; value is generally low to moderate depending on clarity, size, and vibrant color saturation. Many bright yellow quartz varieties on the market are heat-treated or irradiated amethyst/smoky quartz.
Special Characteristics
Displays piezoelectricity (generates electric charge under mechanical stress) and may show color modifications when exposed to specific irradiation processes.
Lore & History
Associated traditionally with clarity of thought, optimism, and solar energy. Linked to the Solar Plexus chakra in modern crystal healing practices, though these are cultural traditions rather than scientific claims.