Dyed Howlite (Red Jasper Imitation)
Dyed Howlite (Silicoborocalcite) · Decorative Stone / Simulant
Crystal System
Monoclinic; typically occurs in massive, nodular, or cauliflower-like habits in its natural state.
Mineral Group
Borates (Silicoborocalcite)
Chemical Formula
Ca2B5SiO9(OH)5 (Base mineral: Howlite) + Red Dye
Formation Process
Natural howlite forms in evaporite deposits, usually in arid regions. The red appearance is achieved through a secondary hydrothermal or chemical dyeing process.
About This Crystal
Heart-shaped cabochon with a vibrant, unnatural crimson-red color. It features a distinctive 'spider-web' or 'matrix' pattern of dark brown and off-white veins where the dye did not fully penetrate or where natural impurities exist. It is opaque with a waxy to vitreous luster.
Physical Characteristics
Color: Bright red (Dyed); Streak: White or faint red depending on dye depth; Cleavage: None visible in massive form; Fracture: Subconchoidal to uneven; Specific Gravity: 2.45–2.58; Fluorescence: Generally inert, but may show dye stains under UV.
Optical Properties
Opaque; No observable pleochroism or dispersion. Refractive Index is approximately 1.58–1.60 (spot reading).
Hardness & Durability
Origin Region
Canada (Nova Scotia), USA (California), and Turkey. Often processed and dyed in China.
Hardness & Durability
Mohs Hardness: 3.5. It is relatively soft and brittle. It can be easily scratched by a steel knife or minerals like quartz. Low durability for rings; better suited for pendants.
Care & Maintenance
Clean with a damp cloth only. Avoid ultrasonic cleaners, steam, and harsh chemicals (acids/alcohol) which will strip the dye. Keep away from prolonged sunlight to prevent fading and store separately from harder stones like quartz or agate.
Rarity & Value
Common and inexpensive. Value is based on the quality of the carving and the aesthetic appeal of the dye pattern. Often used as an imitation for red jasper or red coral.
Special Characteristics
Porous structure allows for deep dye penetration. The 'matrix' patterning mimics natural stone, though the high-saturation red is a diagnostic sign of artificial treatment.
Lore & History
Natural howlite was discovered in 1868 by Henry How. While the red version is man-made, practitioners of crystal healing often associate it with the Root Chakra, combining the calming properties of howlite with the energetic associations of the color red.