Geode information - any to tell compositions without cracking

[tasmith@otelco.net]

 

[DDancer]

Composition of the interior? No way to know without cutting or cracking. The exterior a hardness test and maybe polish a flat window into the side to see what it shows. Most likely the exterior will be chalcedony but its the interiors of geodes that classify them.

 

[tasmith@otelco.net]

Thanks!