Mineral Or Sedimentary Rock (With Mineral Inclusions)

Quartz (chalcedony variety) or Limestone with Quartz Veins

SiO2 (for Quartz/Chalcedony); CaCO3 (for Limestone)

Green Jasper

Microcrystalline Quartz (SiO2) with mineral inclusions

Sandstone (River Cobble)

Clastic sedimentary rock (primarily SiO2)

Amygdaloidal Basalt

Amygdaloidal Basalt (extrusive volcanic rock with mineral inclusions)

Zebra Jasper

Silicified sedimentary rock (SiO2) with mineral inclusions

Vein-filled Sedimentary Rock

Silicified sedimentary rock with quartz/calcite vein

Banded Sedimentary Rock

Sedimentary rock with mineral veins/banding

Golden mica schist

Mica-rich schist, likely muscovite schist (quartz and mica; exact minerals cannot be confirmed from the image)

Greenstone (likely chlorite- or actinolite-rich metabasalt)

Metamorphosed mafic volcanic rock; commonly greenschist-facies basalt, composed chiefly of chlorite, actinolite, epidote, and albite

Worn River Pebble with Fossil Indentation

Sedimentary Rock with Fossil Infill

Dendritic Agate or Moss Agate Nodules (Septarian-like)

Chalcedony with mineral inclusions (SiO2)

Leopard Jasper

Microcrystalline Quartz (SiO2) with mineral inclusions

Plume Agate

Silicon Dioxide (SiO2)

Quartz-bearing pegmatitic rock with feldspar

Granitic pegmatite; chiefly quartz (SiO₂), feldspar, and mica

Green Jasper

Silicon Dioxide (SiO2) with mineral inclusions

Polychrome Jasper (Desert Jasper)

Silicon dioxide with mineral inclusions (SiO2)

Imperial Jasper

Silicon Dioxide (SiO2) - Microcrystalline Quartz with Mineral Inclusions

Green Jasper

Silicon Dioxide (SiO2) with mineral inclusions

Green Jasper

Silicon Dioxide (SiO2) with mineral inclusions

Fancy Jasper

Silicon Dioxide (SiO2) with mineral inclusions

Geode half

Geode (often quartz/chalcedony based)

Red Jasper

Microcrystalline Quartz (SiO2)

Quartz Geode

Quartz (SiO2) within a geode structure

Coarse-grained gray metamorphic rock, likely gneiss

Biotite–quartz–feldspar gneiss (probable)

Jasper with Purple Fluorite or Chalcedony

Silicon Dioxide (SiO2) with mineral inclusions

Biotite gneiss (probable)

Foliated quartz–feldspar–mica gneiss; commonly containing biotite mica, quartz, and plagioclase/alkali feldspar

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Reddish weathered volcanic rock, probably andesite

Andesite (fine-grained plagioclase–pyroxene volcanic rock), possibly altered basalt

Banded Sedimentary Rock (Wishbone Stone / Banded Quartzite or Limestone)

Silicified limestone or banded sedimentary rock with mineral veins

Weathered iron-rich limestone or marl

Calcitic carbonate rock with limonite/goethite and clay impurities (predominantly CaCO₃)

Band Agate / Jasper

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Quartz Geode

Quartz (Silicon Dioxide, SiO2)

Banded gneiss

Gneiss, commonly quartz–feldspar–biotite gneiss

Shale or Slaty Mudstone

Argillaceous sedimentary rock

Educational Geologic Collection

Mixed Mineral and Rock Collection (Various compositions)

Hag Stone (Adder Stone / Geode-bearing Pebble)

Sedimentary Rock with Cavity (often Quartzite, Limestone, or Sandstone)

Rough amber-colored quartz or calcite fragment

Likely quartz (SiO₂) or calcite (CaCO₃); exact identification requires testing

Conglomerate Pebble (with Chert / Quartz)

Sedimentary Conglomerate / Breccia Pebble

Sandstone

Arenite

Quartz vein in host rock

Quartz (SiO₂), likely in a weathered carbonate or sedimentary matrix

Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

Sandstone with Mineral Veining or Crust

Sedimentary Sandstone (mostly SiO2 with Fe2O3 tinting)