mineral

Tumbled pale green aventurine or chalcedony

Quartz-group silica, primarily microcrystalline SiO₂; possible fuchsite-bearing aventurine

AI-generated identification · may be incorrect

Typically Mohs hardness 6.5–7, translucent pale green, with a waxy to vitreous luster and no visible cleavage. The rounded shape and smooth surface indicate tumbling; internal inclusions or fractures create the cloudy appearance.

Identified August 22, 2026More mineral →

Explore Tumbled pale green aventurine or chalcedony 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

Forms when silica-rich fluids fill fractures or cavities, later crystallizing as chalcedony or quartz; green aventurine gains color from mica or other inclusions. Exact geological age cannot be determined from the photograph.

Uses & applications

Used as a decorative tumbled stone, carving material, and inexpensive cabochon or jewelry component; not generally used structurally.

Geological facts

The specimen may also be pale-green fluorite or glass, but its rounded lapidary form is consistent with a processed geological material. A scratch test and refractive or specific-gravity testing would distinguish alternatives.

Field identification & locations

Common sources include Brazil, India, Madagascar, and Africa. Quartz varieties resist scratching by steel; aventurine commonly shows subtle glitter, while chalcedony has a more uniform waxy appearance.