turritella or elimia agate tumbled fossilized stones

turritella agate named thinking shells fossilized stone genus cone spiral sea snail later discovered incorrect fossil fact elimia freshwater time name popular still referred modern times ‘turritella agate’ green river area wyoming true fossils numerous locations world sold appearance crystal stones rocks gems metaphysical healing gravel mineral pebble theoretical theoretic abstract conceptual mental spiritual intellectual speculative quartz tumbled fossilize