🦴 Fossil facts

AgeOrdovician to Permian, most common in Mississippian rocks about 340–320 million years ago
Origin & sourcesIllinois, Indiana, Kentucky and Alabama (Pentremites), and the Permian of Timor (Indonesia).
CompositionCalcite plates (theca), often weathered free of shale

How it forms

Blastoids were stalked echinoderms related to crinoids, with a bud-shaped head of five-fold calcite plates. They lived on muddy seafloors, and their compact heads often survive whole.

🌍 Where it's found

  • Type locality
  • Notable source / deposit
  • Country of origin

Marker positions are approximate (region or locality level). Type localities from Wikidata; notable sources curated by Crystopedia.

✨ Metaphysical & Folklore

These are traditional and folk beliefs from crystal lore. They are not scientific or medical claims – crystals are not a substitute for professional care.