Red Jasper (Vesicular)
Quartz var. Jasper · Semi-Precious Gemstone / Mineral Specimen
Crystal System
Trigonal (Cryptocrystalline architecture)
Mineral Group
Silicates (Tectosilicate)
Chemical Formula
SiO2 with Fe2O3 (Hematite) impurities
Formation Process
Typically formed through the infiltration of silica-rich fluids into volcanic ash or fine-grained sediment, or as replacements in vesicular volcanic rocks where gas bubbles once existed.
About This Crystal
An opaque, microcrystalline variety of quartz exhibiting an earthy to dull luster on current surfaces. It features a reddish-brown color due to iron oxide inclusions. The specimen is notable for its vesicular texture, displaying numerous small cavities (vughs) or pits, likely remnants of gas bubbles or weathered-out secondary minerals.
Physical Characteristics
Color: Brick-red to terracotta; Streak: White or brownish; Cleavage: None; Fracture: Conchoidal to uneven; Specific Gravity: 2.58-2.91; Fluorescence: Typically inert.
Optical Properties
Opaque (not applicable for light transmission tests); Refractive Index: approximately 1.54; No pleochroism or dispersion visible due to opacity.
Hardness & Durability
Origin Region
Globally distributed; notable sources include India, Australia, Brazil, and the USA (Southwest). Found in sedimentary and volcanic environments.
Hardness & Durability
Mohs Hardness: 6.5-7; Toughness: Excellent; Very durable and stable for jewelry and handling.
Care & Maintenance
Wash with warm soapy water. Avoid harsh chemicals that could settle in the deep pits/vesicles. Safe for ultrasonic cleaners if no structural cracks are present.
Rarity & Value
Common; value is determined by color pattern and polish. Raw vesicular specimens have modest value as collector pieces or lapidary rough.
Special Characteristics
Vesicular structure (pitted surface) and potential druzy quartz coatings within the deepest cavities.
Lore & History
Historically known as the 'Supreme Nurturer.' Used by ancient Egyptians in amulets to boost energy and by Native Americans as a 'blood of Mother Earth' stone. Associated with the Root Chakra in traditional healing lore.