Not a Bird Feather (Lava Rock/Scoria)

The object in the image is not a bird feather but a piece of scoria or basaltic lava rock. It displays a highly vesicular texture formed by gas escaping while the lava cooled. It lacks all diagnostic avian structures such as a rachis, vane, or calamus.

Charcoal grey to black with sections of reddish-brown iron oxidation; no biological pigmentation

Vesicular volcanic basalt; contains gas bubbles (vesicles) rather than barbs or barbules

Abrasive, rough, and sharp; matte finish with high porosity and irregular craters

Porous texture, dark mineral coloration, lack of keratinous structure, irregular rocky form

Volcanic regions, lava fields, or areas with tectonic activity

Global distribution in volcanic hotspots (e.g., Iceland, Hawaii, Italy, Pacific Northwest)

Provides mineral substrate for pioneer plant species in primary succession.

None (Distinguishable from feathers by density and inorganic composition)

Scoria is often used in landscaping and as a lightweight abrasive. It forms from gas-rich basaltic magma during explosive volcanic eruptions.

Weathered mineral specimen with oxidized sections