metamorphic

Jasper in Quartzite (likely Cinnabar or Iron inclusions)

Silicon dioxide (SiO2) with impurities

AI-generated identification · may be incorrect

Hardness: 6.5-7 on Mohs scale. Color: White or light grey base with red inclusions. Luster: Dull to waxy. Structure: Microcrystalline. Cleavage: None (conchoidal fracture).

Hardness: 6
Color: White or light grey base with red inclusions
Luster: Dull to waxy

Identified April 11, 2026More metamorphic →

Explore Jasper in Quartzite (likely Cinnabar or Iron inclusions) in the encyclopedia →

Identify your own rocks.

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

App Store Google Play

Physical properties

Hardness: 6.5-7 on Mohs scale. Color: White or light grey base with red inclusions. Luster: Dull to waxy. Structure: Microcrystalline. Cleavage: None (conchoidal fracture).

Formation & geological history

Formed through the regional metamorphism of quartz-rich sandstone. The red spots are often iron oxide (hematite) or cinnabar inclusions trapped during crystallization or secondary fluid infiltration.

Uses & applications

Aesthetics, lapidary arts, decorative gravel, and collectibles. Occasionally used in jewelry as 'pigeon blood' or 'strawberry' quartz cabochons.

Geological facts

Specimens with distinct red spots on a white background are sometimes nicknamed 'St. John's Gold' or simply 'Spotted Quartzite'. If the red spots are cinnabar, the rock contains mercury.

Field identification & locations

Identify in the field by its hardness (it will scratch glass) and its smooth, water-worn texture if found near riverbeds or beaches. Look for the contrast between the opaque white matrix and the sharp red spots.