sedimentary

Wood Stone (Dragon Stone variant)

Argillaceous Sedimentary Rock

AI-generated identification · may be incorrect

Hardness: 3-5 Mohs. Color: brown, tan, and grey. Luster: earthy to dull when dry, waxy when wet. Structure: highly textured, layered, and craggy. Cleavage: irregular. Specific Gravity: 2.2-2.6.

Hardness: 3-5 Mohs
Color: brown, tan, and grey
Luster: earthy to dull when dry, waxy when wet

Identified June 20, 2026More sedimentary →

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Physical properties

Hardness: 3-5 Mohs. Color: brown, tan, and grey. Luster: earthy to dull when dry, waxy when wet. Structure: highly textured, layered, and craggy. Cleavage: irregular. Specific Gravity: 2.2-2.6.

Formation & geological history

Formed through the accumulation and compression of fine-grained clay and silt particles over millions of years, often near water bodies where erosion creates deep pits and ridges.

Uses & applications

Primarily used in aquascaping, vivariums, and high-end terrariums because it is chemically inert and highly aesthetic.

Geological facts

It is often called 'Wood Stone' or 'Elderly Stone' because its rugged, grooved texture mimics the appearance of ancient tree bark or petrified wood.

Field identification & locations

Identify by its deeply weathered, jagged surface and lightweight feel compared to limestone. Found globally but high-quality decorative specimens are frequently sourced from East Asia.