Red Jasper
Quartz (microcrystalline) var. Jasper · Semi-Precious Gemstone / Mineral Specimen
Crystal System
Trigonal crystal system; typically occurs in massive, microcrystalline habits without visible crystal faces.
Mineral Group
Silicates (Tectosilicate subgroup)
Chemical Formula
SiO2 with Fe2O3 (Hematite) inclusions
Formation Process
Forms when silica-rich fluids permeate through volcanic ash or sedimentary rocks, often through hydrothermal circulation or groundwater precipitation.
About This Crystal
An opaque, microcrystalline variety of quartz. It features a deep brick red to brownish-red color caused by iron oxide (Hematite) inclusions. This specimen shows a dull to earthy luster on the raw surface and a thin white quartz vein running through the center.
Physical Characteristics
Color: Brick red; Streak: White; Cleavage: None; Fracture: Conchoidal to uneven; Specific Gravity: 2.58-2.91; Fluorescence: Typically inert.
Optical Properties
Refractive Index: 1.544-1.553; Birefringence: Ultra-low or none (aggregate); Pleochroism: None; Diaphaneity: Opaque.
Hardness & Durability
Origin Region
Found globally; major sources include India, Brazil, USA (Oregon, Idaho), and South Africa. Typically found in sedimentary or low-grade metamorphic environments.
Hardness & Durability
Mohs Hardness: 6.5 to 7.0; Toughness: Very high due to its aggregate structure; highly durable for all types of jewelry.
Care & Maintenance
Clean with warm soapy water and a soft brush. Resistant to most household chemicals but should be kept away from hydrofluoric acid. Stable under sunlight.
Rarity & Value
Common; very affordable. Value is determined by color intensity and the presence of interesting patterns or secondary mineral inclusions.
Special Characteristics
Contains distinct white silica veining; lacks the transparency of other quartz varieties due to a high percentage of mineral impurities (up to 20%).
Lore & History
Historically known as the 'stone of endurance' and used in antiquity for seals and amulets. Culturally associated with grounding, physical strength, and the Root Chakra in various traditional belief systems.