sedimentary
Wood Stone (Dragon Stone variant)
Argillaceous Sedimentary Rock
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
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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.
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