Druzy Quartz on Matrix
Quartz (Variety: Druzy or Drusy) · Mineral Specimen / Decorative Stone
Crystal System
Trigonal; typically druzy habit consisting of tiny, tightly packed hexagonal prisms
Mineral Group
Silicates (Tectosilicate subgroup)
Chemical Formula
SiO2 (Silicon Dioxide)
Formation Process
Hydrothermal/Sedimentary; forms as silica-rich fluids precipitate tiny crystals onto the surface of a host rock or inside mineral cavities.
About This Crystal
Mass of tiny, sparkling crystals covering a rock surface. In this specimen, the crystals appear colorless to white with a vitreous (glassy) luster, creating a sugar-like glittering effect over a darker, possible basaltic or sedimentary matrix.
Physical Characteristics
Color: Colorless/White; Streak: White; Fracture: Conchoidal (micro); Specific Gravity: 2.65; Fluorescence: Usually inert, though may vary based on trace impurities.
Optical Properties
Refractive Index: 1.544-1.553; Birefringence: 0.009; No visible pleochroism in druzy form; exhibits high surface reflection (sparkle).
Hardness & Durability
Origin Region
Global; notably Brazil, Uruguay, and USA (Arizona/Missouri). Often found in geode cavities and volcanic rock vugs.
Hardness & Durability
Mohs Hardness: 7; Toughness: Brittle; Highly durable and resistant to most environmental factors, making it stable for display.
Care & Maintenance
Wash with warm soapy water and a soft brush to remove dust from crevices. Avoid dropping as the tiny crystals can chip or shear off the matrix.
Rarity & Value
Common; Value is determined by the coverage of the druzy, the color contrast with the matrix, and the size of the overall specimen. Generally affordable.
Special Characteristics
Scattered reflection (scintillation) caused by hundreds of tiny crystal faces refracting light simultaneously.
Lore & History
Historically used in jewelry and ornamentation; in metaphysical traditions, it is believed to amplify energy and promote find-tuned perception. Associated with the Crown Chakra.