Jasper with Hematite
Quartz (Variety: Jasper) inclusions with Hematite · Semi-Precious Gemstone / Decorative Stone / Mineral Specimen
Crystal System
Trigonal crystal system; typically occurs in massive, microcrystalline, or cryptocrystalline habits without visible crystal faces.
Mineral Group
Silicates (Tectosilicate subgroup), specifically a variety of chalcedony.
Chemical Formula
SiO2 with Fe2O3 (Iron Oxide) impurities
Formation Process
Primarily sedimentary or hydrothermal; forms when silica-rich fluids permeate porous rock or volcanic ash, consolidating over time at low to moderate temperatures.
About This Crystal
An opaque, microcrystalline variety of quartz. This specimen displays a mottled reddish-brown to dark gray color palette with a waxy to vitreous luster when wet. It features irregular color zoning and granular textures.
Physical Characteristics
Color: Red-brown, gray, ochre; Streak: White to pale red; Cleavage: None; Fracture: Conchoidal to uneven; Specific Gravity: 2.58–2.91; Fluorescence: Generally inert.
Optical Properties
Refractive Index: 1.544–1.553; Birefringence: Weak (0.009); Pleochroism: None; Diaphaneity: Opaque; Optical Character: Uniaxial positive.
Hardness & Durability
Origin Region
Globally distributed; notable sources include India, Russia, Brazil, Madagascar, and various regions of the western United States.
Hardness & Durability
Mohs Hardness: 6.5–7; Toughness: Excellent due to microcrystalline structure; Stability: High resistance to most chemicals and heat.
Care & Maintenance
Wash with warm soapy water and a soft brush. While durable, it should be stored separately from harder gemstones like sapphire or diamond to prevent scratching.
Rarity & Value
Common; value is determined by pattern uniqueness and polish quality. Raw specimens are generally inexpensive and widely available for lapidary use.
Special Characteristics
Displays varying degrees of magnetism if hematite content is high; often contains orbicular or dendritic inclusions (not clearly visible in this specific specimen).
Lore & History
Historically known as the 'Supreme Nurturer' in various cultures. Used by ancient Egyptians and Native Americans for amulets and tools; traditionally associated with grounding and the Root Chakra.