Chalcedony - Charroux, Charente, France
Complete chalcedony geode, slightly bluish (bluer in reality...
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Complete chalcedony geode, slightly bluish (bluer in reality...
Botryoidal quartz, commonly known as "Agate grappe", is...
Botryoidal quartz, commonly known as "agate grappe",...
Botryoidal quartz, commonly known as "Agate grappe", has a...
Botryoidal quartz, commonly known as "Agate grappe", has a...
Botryoidal quartz, commonly known as "Agate grappe", is...
Botryoidal quartz, commonly called "agate grappe", bicoloured...
Botryoidal quartz, commonly called "cluster chalcedony"...
Quartz of the Indonesian amethyst variety, known commercially...
Botryoidal quartz, commonly called "cluster chalcedony", has a...
Half-geode of orange to white mamelonned chalcedony, from the...
Quartz of the amethyst variety from Indonesia, known by the...
Almost complete geode (in two pieces) of brown to white...
Full geode of matte quartz as covered with a film of white...
Half-geode of chalcedony covered with colorless microquartz,...