Anthropogenic (Human Made) Sedimentary Like Material

Zircon

Zircon (ZrSiO4)

Limestone Pebble

Calcium Carbonate (CaCO3)

Crushed Granite Gravel

Granite (composed primarily of Quartz, Alkali Feldspar, and Plagioclase Feldspar)

Limestone with Calcite Veins

Sedimentary Calcium Carbonate (CaCO3)

Labradorite

Labradorite ((Ca, Na)(Al, Si)4O8)

Sandstone (River Rock)

Arenite (composed primarily of SiO2)

Sandstone with Manganese Dendrites/Oxide coatings

Arenite with Pyrolusite and Romanechite (MnO2)

Ferruginous Sandstone

Clastic Sedimentary Rock (Iron-rich)

Sandstone

Arenite (composed primarily of SiO2)

Piddock bored rock (Boring Stone)

Ichnofossil-bearing Limestone or Mudstone (trace fossils by Pholadidae)

Sandstone (Stream Pebble)

Arenite (primarily SiO2)

Sandstone with Concretions / Liesegang Rings

Arenite with iron oxide banding

Crinoid Fossil in Limestone

Crinoid (Class Crinoidea) in Fossiliferous Limestone (CaCO3)

Ferruginous Sandstone

Clastic sedimentary rock (SiO2 with Fe2O3/FeO(OH) cement)

Ruby (Raw/Rough)

Corundum (Al2O3 with Chromium trace)

Diorite

Diorite (Intermediate intrusive igneous rock)

Schist

Mica Schist

Coral (Precious Coral)

Corallium rubrum (Red Coral), Paracorallium japonicum (Momo Coral), Pleurocorallium elatius (Sardinian Coral), various other species within the Corallidae family. Chemically, it's primarily Calcium Carbonate (CaCO 3 ).

Fluorite

Fluorite (CaF₂)

Sandstone (Stream-rounded)

Arenite (SiO2 based)

Rose Quartz

Quartz (Silicon Dioxide, SiO2) with trace inclusions of dumortierite

Sandstone (Ferruginous)

Arenite with Iron Oxide cement (primarily SiO2 with Fe2O3)

Quartz (Engineered Quartz Surface)

Silicon Dioxide (SiO2) based composite

Quartz Geode

Silicon Dioxide (SiO2)

Jasper with Quartz inclusion

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Diamond

Diamond (C)

Sandstone (Ferruginous)

Clastic Sedimentary Rock (primarily SiO2 with Fe2O3 staining)

Geode (unopened nodule)

Silicon Dioxide (SiO2) Nodule

Anthracite Coal

Anthracite (Carbon-rich metamorphic rock)

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Diorite (with Iron Staining)

Phaneritic Intermediate Igneous Rock

Sandstone

Arenite (primarily SiO2)

Turquoise

Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]

Gneiss

Gneiss

Gneiss

Foliated Metamorphic Rock (Gneiss)

Emerald

Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities

Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Green Fluorite

Fluorite (Calcium Fluoride - CaF2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Sandstone

Arenite (primarily SiO2)

Anthracite Coal

Anthracite (high-rank coal)