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Beautifully sculptural formed ensamble of chalcedony formations from Mexico. There is a vertical oriented plate at the bottom from which...

A beautifully detailed specimen of dark but clear highly lustrous azurite crystals settled on a craggy inner face covered in bluish...

A specimen of large crystals of aragonite replaced as hollow and layered casts of chalcedony with a distinct blue red colour through the...

Nice example of half a geode with pale amethyst/smoky quartz crystals with calcite on top. Labeled to be from Brazil but typical "mexican...

Grey chalcedony covered by quartz crystals

A beautifully detailed specimen of dark but highly lustrous azurite crystals settled on a craggy inner face covered in bluish chalcedony...

Nice pale grayish blue Mexican chalcedony vug (half).

Laguna agate nodule with good translucency. The fracture seen in the photos is sub-surface. The colorless portion of the agate is...

A little 'Birds Nest' of chalcedony. Fluoresces bright green under short wave UV and slight fluorescence under long wave.

Highly lustrous cluster of melanite from Mexico. The main crystal measures 2 cm. Inbetween the crystals there is some slightly UV reactive...

Partial open geode from Mexico showing beautiful botryoidal formations of chalcedony. There is one exposed stalactitic formation right in...

Classic half of hollow "Coconut-Geode" from the famous locality: Las Choyas, Aldama Municipality, Chihuahua, Mexico: Filled with druzy rock...

Fluorescent half geode with Quartz, Chalcedony and Opal-AN Neon green uranyl activated fluorescence - UV SW Photos in SW, LW , MW and...