Anthropogenic Material (Man Made Rock)

Pink Granite

Granite (Phaneritic igneous rock rich in Alkali Feldspar)

Granite Pebble

Granite (Felsic Intrusive Igneous Rock)

Granite

Granite (High-silica plutonic rock)

Limestone

CaCO3 (Mainly Calcite or Aragonite)

Banded Gneiss (River Rock/Pebble)

Gneiss (specifically a banded variety often found as a river rock)

Shale

Fissile mudstone (rich in clay minerals and quartz)

Limestone

Sedimentary Calcium Carbonate (CaCO3)

Iron Meteorite (likely Chondrite or weathered Iron-Nickel)

Meteorite (Fe-Ni alloy & silicates)

Peridot

Olivine (Magnesium Iron Silicate), (Mg, Fe)2SiO4

Limestone

Calcium Carbonate (CaCO3)

Sandstone (Quartzose Sandstone)

Arenite (primarily SiO2)

Quartzite

Quartzite (SiO2 silicon dioxide)

Ironstone Concretion (Iron-rich Mudstone)

Siderite / Geothite concretion (FeCO3 / FeO(OH))

Blue Quartzite (Aventurine variety)

Silicon Dioxide (SiO2) with inclusions of Dumortierite or Magnesio-riebeckite

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Sandstone (Ferruginous)

Arenite with Iron-Oxide Cement

Limestone (Micrite/Chalky variety)

Calcium Carbonate (CaCO3)

Sandstone (Weathered Cobble)

Clastic sedimentary rock (primarily SiO2)

Pyrite

Iron Sulfide (FeS2)

Granite

Granite (Mainly Quartz: SiO2, Feldspar: KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8, and Mica)

Sandstone

Clastic sedimentary rock (primarily SiO2)

Greenstone / Greenstone Pebble

Greenschist (metamorphosed basalt or gabbro)

Soapstone

Steatite (composed primarily of Talc: Mg3Si4O10(OH)2)

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 ).

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Fossiliferous Limestone

Biogenic Limestone (Calcium Carbonate, CaCO3)

Citrine

Silicon Dioxide (SiO2)

Green Jasper

Silicon Dioxide (SiO2) with impurities of iron(II) silicate

Calligraphy Stone

Mariam Jasper (Fossiliferous Limestone composed of Hematite and Shell remains)

Peridot

Olivine (specifically, the gem-quality variety forsterite, (Mg,Fe)2SiO4)

Granite

Granite (Phaneritic Quartz-Feldspar Rock)

BROWN GRANITE (likely 'Tan Brown' or similar)

Granite (specifically a variety rich in orthoclase feldspar, often with biotite and possibly hornblende)

Sandstone (Ferruginous)

Arenite (Fe2O3 rich)

Chert / Chalcedony

Silicon Dioxide (SiO2)

Sandstone (Ferruginous)

Arenite (with Iron Oxide)

Fossiliferous Limestone

Biogenic Limestone (Calcium Carbonate, CaCO3)

Chert (Fossiliferous)

Silicon dioxide (SiO2)

Limestone

Calcium Carbonate (CaCO3)

Banded Gneiss

Gneiss (High-grade regional metamorphic rock)

Limestone

Calcium Carbonate (CaCO3)

Quartzite

Metamorphic Quartzite (primarily SiO2)

Limestone

Calcium Carbonate (CaCO3)