metamorphic

Yellow Quartzite (Tumbled)

Quartzite (SiO2)

AI-generated identification · may be incorrect

Hardness: 7 (Mohs scale); Color: Pale yellow to honey gold; Luster: Vitreous to waxy (when polished); Crystal Structure: Hexagonal/Trigonal (microcrystalline); Cleavage: None; Specific Gravity: 2.63–2.65

Hardness: 7 (Mohs scale)
Color: Pale yellow to honey gold
Luster: Vitreous to waxy (when polished)

Identified April 22, 2026More metamorphic →

Explore Yellow Quartzite (Tumbled) in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Formed through the metamorphism of quartz-rich sandstone. High heat and pressure cause quartz grains to recrystallize and fuse together, creating a incredibly hard, dense rock. The yellow color is typically caused by iron oxide inclusions (limonite).

Uses & applications

Used primarily as decorative stone, aquarium gravel, landscape material, and in tumbled form for crystal healing or pocket stones. High-grade quartzite is also used for building facades and countertops.

Geological facts

Quartzite is so hard that it can scratch glass and steel. It is frequently mistaken for similar-looking marble, but marble is much softer and will fizz when exposed to acid, whereas quartzite will not.

Field identification & locations

Identify in the field by its grainy, sugary texture under a lens and its extreme hardness. It won't be scratched by a knife blade. Commonly found in folded mountain belts and ancient shield regions globally.