Banded Sandstone (River Pebble)

Hardness: 6.5-7 (Mohs), Color: Tan with white/cream bands, Luster: Dull/Earthy, Crystal structure: Granular/Microcrystalline, Cleavage: None, Specific Gravity: 2.2-2.8

Formed from the lithification of sand-sized mineral particles or rock fragments. The banding occurs due to seasonal changes in deposition or variations in mineral content (like quartz or calcite) during formation. The smooth, rounded shape indicates it was transported and eroded by water in a river or coastal environment.

Commonly used for landscaping, as garden stones, or simply as decorative river pebbles. Generally holds no high industrial or jewelry value in this raw, weathered form.

Sandstone makes up about 20-25% of all sedimentary rocks on Earth. The layers, or 'laminae', represent a snapshot of the environmental conditions at the exact moment that layer of sand was deposited millions of years ago.

Identify in the field by its distinct grainy texture (resembling sandpaper) and visible layering. It is commonly found in dried riverbeds, beaches, and areas with ancient sedimentary basins. Collectors often look for unique banding patterns.