Slice of amethyst geode bordered with agate, black base
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Serie of 6 agate slices on brass cubic stand
Eroded Agate 640g on brass base - Poland (Wistoka river)
Fluorite ball -Marienschacht Mine , Wölsendorf, , Germany-
Boulder Opal (two parts) of 345g on black base -Australia-
Crystalized branch with gypsum under glass (Wahpool lake, Australia)