metamorphic
Greenstone / River Jadeite pebble
Metavolcanic rock / Chlorite or Actinolite-rich schist
Hardness: 5-6.5 Mohs (depending on mineralogy), Color: Dull to sage green with fine flecks, Luster: Waxy to dull, Texture: Fine-grained to micro-crystalline, Specific Gravity: 2.8-3.0
- Hardness
- 5-6
Identified More metamorphic →
Explore Greenstone / River Jadeite pebble in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 5-6.5 Mohs (depending on mineralogy), Color: Dull to sage green with fine flecks, Luster: Waxy to dull, Texture: Fine-grained to micro-crystalline, Specific Gravity: 2.8-3.0
Formation & geological history
Formed via low-grade regional metamorphism of basaltic or oceanic crust rocks, often in subduction zones or mountain-building environments. This specimen appears water-worn into a river cobble.
Uses & applications
Informal landscaping, decorative gravel, historical tool making (celts/axes), or carving if of high enough mineral density.
Geological facts
Small green river rocks like this are often referred to as greenstone, a catch-all term for altered basic igneous rocks. They get their color primarily from the presence of chlorite, epidote, or actinolite minerals.
Field identification & locations
Identify by its olive-to-sage green hue and smooth, water-worn surface. Often found in riverbeds or coastal beaches in geologically active regions like the Pacific Northwest, New Zealand, or the Appalachians.
More like this
