Basalt with Iron Oxidation (Lattice/Veined)

Physical Properties

Hardness: 6 (Mohs). Color: Dark gray to black matrix with orange-yellow iron oxide staining/veining. Luster: Dull/Sub-metallic staining. Structure: Fine-grained, aphanitic texture.

Formation & Geological History

Formed from the rapid cooling of magnesium-rich and iron-rich lava at the earth's surface. The orange veining occurs through secondary chemical weathering or hydrothermal mineral deposition within micro-fissures.

Uses & Applications

Used primarily in construction (crushed stone, road base) and occasionally as decorative river stones or in landscaping.

Geological Facts

Basalt is the most common rock type in the Earth's crust and makes up most of the ocean floor. The orange bands are likely limonite or goethite, representing 'rusting' of the iron-rich minerals within the rock.

Field Identification & Locations

Identify by its heavy weight (high specific gravity), dark color, and fine-grained texture. Commonly found in volcanic regions, riverbeds, and coastal areas as smooth, water-worn pebbles.

Identified on: 4/15/2026

Mode: Standard