Organic (Non-rock)

Oak Wood (Wood Grain Pattern)

Quercus (genus)

Hardness: Approx 1,300 lbf (Janka scale); Color: Light brown to medium golden-brown with dark streaks; Luster: Matte to satin; Structure: Porous ring-structured organic fibers; Cleavage: None (fibrous splitting along grain).

Hardness: Approx 1,300 lbf (Janka scale)
Color: Light brown to medium golden-brown with dark streaks
Luster: Matte to satin

Identified March 18, 2026More organic (non-rock) →

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Physical properties

Formation & geological history

Formed through the biological growth of Oak trees over decades; found in temperate forests across the Northern Hemisphere (North America, Europe, Asia).

Uses & applications

Extensively used in high-quality furniture making, flooring, cabinetry, interior trim, and historically for shipbuilding and barrel making (cooperage).

Geological facts

Oak trees can live for over 1,000 years. The 'rays' or vertical lines visible in the grain are medullary rays, which transport nutrients horizontally through the tree trunk.

Field identification & locations

Identified in the field by its prominent 'open' grain, distinct pore structure, and characteristic medullary rays when quarter-sawn. Very common in domestic interior environments.

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