metamorphic
Likely jade (greenstone)
Possibly nephrite jade, a compact tremolite–actinolite amphibole aggregate; the photo is insufficient to distinguish it from other green minerals.
AI-generated identification · may be incorrectSmall, opaque green piece with a smooth, waxy-looking surface and dark matrix or backing. Nephrite is typically Mohs 6–6.5, tough, and has a fibrous interlocking structure; hardness and specific gravity cannot be tested from the image.
Identified More metamorphic →
Explore Likely jade (greenstone) in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Small, opaque green piece with a smooth, waxy-looking surface and dark matrix or backing. Nephrite is typically Mohs 6–6.5, tough, and has a fibrous interlocking structure; hardness and specific gravity cannot be tested from the image.
Formation & geological history
Nephrite forms during metamorphism and metasomatic alteration, commonly where fluids react with magnesium-rich rocks. Its age depends on the local host rocks and cannot be determined visually.
Uses & applications
Jade is carved for ornaments and jewelry; nephrite has also been used for tools. This specimen’s small size and uncertain identification limit valuation.
Geological facts
“Jade” refers to either nephrite or jadeite, distinct minerals that can look similar; laboratory or gemological testing is needed to confirm which one this is.
Field identification & locations
The reported Kern County area is geologically varied, so the location alone does not confirm jade. Check for uniform green material, exceptional toughness, and a waxy polish; a scratch or density test should be done cautiously, since the dark portion may be matrix.
More like this
