Sometimes Jaspers - especially from California - were broken into smaller fragments due to the tectonic movements.
Later the gaps were filled in with chalcedony, quartz of greater purity, or even agate.
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Cayucos Beach Jasper, San Luis Obispo County |

Cayucos Beach Jasper, San Luis Obispo County |
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Stone Canyon Jasper, Monterey County |

San Simeon Creek Jasper, San Luis Obispo County |

Jasper, Trinidad, Humboldt County
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San Simeon Creek Jasper, San Luis Obispo County |

Clear Creek Jasper, San Benito County |

Stony Creek Jasper, Glenn County
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Stony Creek Jasper, Glenn County |
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