Red Jasper
Quartz (Microcrystalline) var. Jasper · Semi-Precious Gemstone / Decorative Stone
Crystal System
Trigonal/Hexagonal; typically occurs in massive, microcrystalline, or cryptocrystalline habits
Mineral Group
Silicates (Tectosilicates)
Chemical Formula
SiO2 with Fe2O3 (Iron Oxide) inclusions
Formation Process
Sedimentary or Hydrothermal; forms as silica-rich fluids permeate porous rocks or through the consolidation of volcanic ash/siliceous ooze
About This Crystal
An opaque, microcrystalline variety of quartz characterized by a deep terracotta to brick-red color. It features a dull to waxy luster on rough surfaces, and smooth, often conchoidal fractured edges.
Physical Characteristics
Color: Brick red; Streak: White; Cleavage: None; Fracture: Conchoidal to uneven; Specific Gravity: 2.6 – 2.9; Tenacity: Brittle but tough; Fluorescence: Usually inert
Optical Properties
Refractive Index: 1.544 - 1.553; Opaque (no double refraction visible to the naked eye); No pleochroism or dispersion effects
Hardness & Durability
Origin Region
Brazil, India, South Africa, and USA (notably in iron-rich sedimentary or volcanic districts)
Hardness & Durability
Mohs Hardness: 6.5 – 7.0; Excellent durability; Very stable and suitable for all types of jewelry and lapidary work
Care & Maintenance
Wash with warm soapy water and a soft brush; resistant to most household chemicals but should be stored away from harder stones like diamonds to avoid scratching
Rarity & Value
Common; Value is generally low but increases for specimens with unique orbicular patterns or high polish; treatments are rare but dyeing is sometimes used to enhance color
Special Characteristics
The red pigmentation is specifically due to the high concentration of iron oxide (hematite) inclusions within the silica matrix
Lore & History
Historically known as the 'Stone of Endurance' and used by ancient Egyptians in amulets to ensure safe passage in the afterlife; traditionally associated with the Root Chakra and grounding energy