Geode of agate on round brass base. Mexico
MINERAL
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Slice of amethyst geode bordered with agate, black base
Prism of gabbro from Madagascar (5.1kg) on brass base
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Brazilian agate slice (1.1kg) on brass base
Boulder Opal (two parts) of 535g on brass base -Australia-
Crystalized branch with gypsum under glass (Wahpool lake, Australia)