Browse by Mineral Type

  • Agates

    Agates are the banded form of the mineral chalcedony, which is a... 

    Agates

  • Jaspers

    In geology, jasper is generally accepted as being an opaque to mostly... 

    Jaspers

  • Magnesites

    Magnesite is magnesium carbonate. It is typically cream colored with a distinctive matrix. 

    Magnesites

  • Obsidians

    Obsidian is a naturally occurring volcanic glass formed by the rapid solidification... 

    Obsidians

  • Rhyolites

    Rhyolite is an extrusive igneous rock. It is the volcanic equivalent of... 

    Rhyolites

  • Phosphates

    Phosphate minerals commonly used as gemstones include turquoise, variscite, phosphosiderite, and apatite. 

    Phosphates

  • Opals

    Opal slabs and specimens in this section will typically consist of common... 

    Opals

  • Fossils

    This group includes any materials that preserve the ancient remains of plants and/or... 

    Fossils