sedimentary

Calligraphy Stone

Mariam Jasper (Fossiliferous Limestone with Hematite and Iron)

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs scale), Color: golden-brown to dark brown with black patterns, Luster: earthy to vitreous when polished, Crystal structure: cryptocrystalline, Cleavage: none

Hardness: 6

Identified April 4, 2026More sedimentary →

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Physical properties

Hardness: 6.5-7 (Mohs scale), Color: golden-brown to dark brown with black patterns, Luster: earthy to vitreous when polished, Crystal structure: cryptocrystalline, Cleavage: none

Formation & geological history

Formed from ancient fossilized sea shells (usually mollusks) and plant material that were compressed and mineralized with iron oxides and hematite over millions of years.

Uses & applications

Commonly used in jewelry (cabochons, beads), decorative carvings, meditation aids, and as a popular specimen for rock collectors.

Geological facts

Also known as Elephant Skin Jasper or Mariam Stone, the unique 'calligraphy' patterns are actually cross-sections of fossilized organic remains. It is found in the Himalayan mountains of India.

Field identification & locations

Identify by its distinctive script-like or swirling brown-on-tan patterns. It feels significantly heavier than plastic imitations due to the iron content and cannot be scratched by a steel knife.