New Tabasco Geodes! Tabasco Geodes are the smallest in the world, found in central Mexico near the town of Tabasco.
Geodes are hollow, spherical rocks containing inward-growing crystal formations (usually quartz or calcite) hidden inside a dull, unassuming exterior. Formed over millions of years within volcanic or sedimentary rock, these “miniature caves” develop as groundwater deposits minerals into cavities.
What are Geodes? | Information, How They Form, Properties – Rare Earth Gallery