Yellow Quartzite Pebble

Hardness 7 (Mohs Scale); color is yellow due to iron oxide inclusions; luster is vitreous or waxy; non-foliated metamorphic structure; composed predominantly of interlocking quartz grains; specific gravity 2.6 - 2.8.

Formed through the metamorphism of quartz sandstone (sedimentary rock) under heat and pressure, causing quartz grains to recrystallize. It is often found as water-worn pebbles in riverbeds or coastal deposits.

Used primarily as decorative stone in landscaping, aquarium gravel, or crushed stone in road construction. Tumbled and polished versions are used for craft jewelry and energy healing practices.

Quartzite is so tough that it usually breaks through the quartz grains rather than along the boundaries between them, unlike its parent sandstone. It is resistant to chemical weathering.

Identify in the field by its hardness (will scratch glass) and lack of reaction to acid. Often found in areas with high metamorphic activity or as alluvial deposits in streams. Collectors look for smooth, translucent, or uniquely colored river-worn specimens.