Synthetic Material (Not A Rock Or Mineral)

Jasper

Jasper (Silicon Dioxide, SiO2)

Sandstone

Arenite (siliciclastic sedimentary rock composed mostly of quartz)

Chert / Chalcedony

Silicon Dioxide (SiO2)

Sandstone (Flagstone)

Arenite (composed primarily of SiO2)

Tumbled dark stone, likely basalt or basaltic rock

Fine-grained mafic volcanic rock; commonly basalt, composed chiefly of plagioclase and pyroxene with possible olivine and iron oxides

Likely iron-rich rock or metallic mineral fragment

Uncertain; possibly limonite/goethite-rich material or weathered iron meteorite fragment

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Staurolite-bearing mica schist (probable)

Mica schist composed chiefly of muscovite/biotite, quartz, and likely staurolite or garnet

Polished ocean jasper (orbicular jasper)

Microcrystalline quartz (SiO₂), commonly with chalcedony and iron-rich alteration minerals

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily SiO2)

Bumblebee Jasper

Calcite-bearing Volcanic Tuff containing Sulfur and Arsenic (Orpiment/Realgar)

Granite

Granite (Felsic Intrusive Igneous Rock)

Silty Shale

Silty Shale (Fissile Sedimentary Rock)

Blue sodalite beads

Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂

Sandstone (lithic/arkosic)

Clastic sedimentary rock (primarily SiO2)

Polished orbicular jasper (likely ocean jasper)

Silicified microcrystalline quartz/chalcedony (SiO₂), with iron-oxide and other mineral inclusions

Sandstone (Red / Iron-stained)

Sandstone (composed predominantly of SiO2 with Fe2O3 cement)

Sandstone (likely Arkosic or Quartzose)

Sandstone (SiO2 with inclusions)

Tumbled quartz-rich rock, likely milky quartz with feldspar

Quartz (SiO₂), probably with feldspar and minor iron-oxide inclusions

Fossilized tooth, likely mammalian molar

Indeterminate Mammalia; mineralized dentine and enamel

Tumbled brown translucent stone, likely quartz/jasper

Microcrystalline quartz (SiO₂), possibly iron-stained chalcedony or jasper

Weathered granite or granitic gneiss

Granite; primarily quartz, feldspar, and mica (possibly metamorphosed to gneiss)

Sandstone

Arenite (CaCO3/SiO2 cemented quartz)

Milky quartz fragment

Quartz (silicon dioxide, SiO₂)

Basalt (Crushed Stone Aggregate)

Mafic Volcanic Basalt (Major Minerals: Plagioclase Feldspar, Pyroxene, Olivine)

Sandstone (Quartz-rich)

Clastic sedimentary rock (SiO2 primary)

Dalmatian jasper

Orbicular microcrystalline quartz rock, commonly rhyolitic or volcanic-feldspar matrix with black arfvedsonite/alkali-amphibole inclusions

Milky Quartz

Silicon Dioxide (SiO2)

Red Granite

Felsic Plutonic Rock (Granite)

Rounded pale quartz-rich pebble

Likely milky quartz or quartzite (SiO₂); exact identification is uncertain from the photograph

Conglomerate

Clastic Sedimentary Conglomerate (SiO2, CaCO3 dominant)

Granite

Granite (Felsic Plutonic Rock)

Sandstone (Ferruginous)

Arenite (Fe2O3 enriched)

Banded Sandstone (Wonderstone)

Sandstone with Liesegang Rings (SiO2 with Iron Oxides)

Chert

Microcrystalline Quartz (SiO2)

Coal

Combustible sedimentary rock

Slate

Metamorphic Rock (Fine-grained)

Petrified Wood

Silicified Wood (SiO2)

Sandstone

Arenite (primarily SiO2)

Sandstone (likely Graywacke or Arkose variant)

Clastic Sedimentary Rock (SiO2 based)

Likely weathered quartz-bearing rock fragment

Indeterminate; appears to contain quartz (SiO₂) with iron-oxide staining, possibly from quartzite, granite, or pegmatite

Fossilized Shark Tooth

Chondrichthyes tooth