Sedimentary Rock (Specifically A Concretion Or Possibly A Geode)

Red Jasper

Jasper (Silica/Silicon Dioxide, SiO2 plus iron inclusions)

Ironstone Concretion

Siderite or Goethite Concretion

Green Calcite

Calcium Carbonate (CaCO3)

Quartz Druze on Matrix

Silicon Dioxide (SiO2)

Druzy Quartz Geode Fragment

Silicon Dioxide (SiO2)

Faceted Clear Quartz

Crystalline Silicon Dioxide (SiO2)

Vesicular basalt (likely weathered lava rock)

Basalt; fine-grained mafic volcanic rock composed chiefly of plagioclase, pyroxene, and commonly olivine

Limestone (specifically Crushed Limestone/Calcictic)

Calcium Carbonate (CaCO3)

Weathered chert or siliceous limestone

Microcrystalline quartz (SiO₂), possibly with carbonate minerals

Ironstone Concretion

Siderite or Hematite Concretion

Chert / Jasper

Microcrystalline Quartz (SiO2)

Dalmatian Jasper

Peralkaline Quartz-Feldspar Rock with Arfvedsonite

Sparkling Druzy Quartz on Matrix

Silicon Dioxide (SiO2) with iron oxide inclusions

Jasper Conglomerate (Puddingstone)

Siliceous Conglomerate (Quartz and Jasper clasts in a fine-grained matrix)

Milky Quartz Geode / Chalcedony Nodule

Quartz (Silicon Dioxide - SiO2)

Geode fragment, likely quartz-lined basalt or chalcedony nodule

Microcrystalline quartz (SiO₂), possibly with iron-oxide staining in a basaltic host

Fossilized tooth, likely a mammalian tooth fragment

Indeterminate fossil tooth; possibly an ungulate or carnivoran tooth

Red jasper-like chalcedony pebble

Microcrystalline quartz (SiO₂), likely iron-stained chalcedony/jasper

Quartz Geode (with possible Manganese or Goethite coating)

Silicon Dioxide (SiO2)

Sandstone (with ripple marks)

Arenite / Quartz Sandstone

Basalt

Aphanitic Mafic Igneous Rock

Chalcedony (Common Agate)

Cryptocrystalline Quartz (SiO2)

Banded Agate (specifically Eye Agate / Chalcedony)

Agate (Cryptocrystalline variety of Quartz, SiO2)

K2 Jasper (K2 Granite)

Azurite in Granite (Biotite Granite with Azurite inclusions)

Septarian Nodule Segment (Turtle Stone)

Septarian Concretion (CaCO3 with Siderite or Calcite infill)

Quartz Geode Fragment

Silicon Dioxide (SiO2)

Septarian Nodule (Dragon Stone)

Septarian Concretion (CaCO3 with Calcite, Aragonite, and Limestone/Bentonite)

Pink Granite

Phaneritic Plutonic Felsic Igneous Rock (Granite)

Yellow Jasper

Silicon Dioxide (SiO2 with iron oxide inclusions)

Carnelian (a variety of Chalcedony)

Silicon Dioxide (SiO2) with iron oxide impurities

Quartz (Druzy)

Silicon Dioxide (SiO2)

Celestite (Celectine)

Strontium sulfate (SrSO4)

Basalt

Basalt (Mafic Igneous Rock)

Sandstone (lithic/greywacke variety)

Arenite (composed primarily of SiO2 with various lithic fragments)

Glauconitic Sandstone (Greensand)

Glauconitic Sandstone ((K, Na)(Fe3+, Al, Mg)2(Si, Al)4O10(OH)2)

Wishing Stone (Basalt or Siltstone with Quartz/Calcite Vein)

Basalt (SiO2+MgO+FeO) or Siltstone with a Quartz (SiO2) or Calcite (CaCO3) vein

Sandstone Beach Pebble

Clastic Sedimentary Rock (primarily Quartz with Iron Oxide coating)

Iron-rich concretion or weathered ironstone

Goethite–hematite limonite aggregate; commonly described as limonite or ironstone

Ironstone Concretion (Moqui Marble)

Iron Oxide Concretion (Fe2O3 / FeO(OH) mixed with SiO2)

Weathered vesicular stone, possibly pumice or scoria

Vesicular volcanic rock; likely pumice (highly vesicular rhyolitic material) or scoria (basaltic material)

Chert

Silicon dioxide (SiO2)

Ferruginous Sandstone

Sandstone (rich in iron oxides/hydroxides)