Metamorphic (Man Made)

Banded Metamorphic Rock (likely Quartzite or Serpentinite/Soapstone)

Metamorphic Rock (possibly a banded Quartzite or a foliated Serpentinite/Talc Schist based on appearance, general term for such a rock is 'Banded Metamorphic Rock' or 'Gneiss' if pronounced banding of different minerals)

Granite with Epidote

Granite, containing quartz, feldspar, and epidote

Biotite (Black Mica)

K(Mg,Fe)3AlSi3O10(OH,F)2

Sandstone

Arenite (composed primarily of Quartz: SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (likely Milky Quartz)

Quartz (SiO₂ - Silicon Dioxide)

Pebble (likely Quartz or Chert)

SiO₂ (Silicon Dioxide) - referring to the likely main mineral composition, Quartz. If it's chert, the scientific name remains SiO₂ with a microcrystalline structure.

Garnet

Almandine (Fe3Al2(SiO4)3)

Red Sandstone

Arenite (Ferruginous Sandstone)

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(OH)2)

Sandstone (Pebble)

Sandstone (arenite, arkose, wacke depending on composition)

Calcite (commonly referred to as Orange Calcite or Honey Calcite given its color)

Calcite

Unakite

Epidotized Granite

Schist

Mica Schist (primarily consisting of muscovite, biotite, and quartz)

Diabase (Greenstone)

Diabase (Dolerite)

Amphibolite with Hornblende

Amphibole-rich Metamorphic Rock (Ca2(Mg,Fe)5Si8O22(OH)2)

Obsidian (Black)

Obsidian (High-silica volcanic glass)

Quartz

Quartz (SiO₂)

Calcite

Calcite (CaCO3)

Greenstone / Greenstone Pebble

Greenschist (metamorphosed basalt or gabbro)

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Plagioclase Feldspar (specifically Albite/Oligoclase)

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

Marble

Metamorphosed Limestone (principally CaCO3)

Sandstone (specifically Arkose or Quartz Arenite)

Arenite (primarily SiO2 with possible Feldspar)

Yellow Jade

Jadeite or Nephrite (NaAlSi2O6 or Ca2(Mg,Fe)5Si8O22(OH)2)

Red Sandstone

Arenite (with Iron Oxide / Hematite staining)

Quartz

Quartz (SiO2 - Silicon Dioxide)

Ferruginous Sandstone (Ironstone)

Clastic Sedimentary Rock (composed of SiO2 with Fe2O3/FeO(OH) cement)

Marble

Recrystallized Calcite (CaCO3)

White Marble

Recrystallized Calcite (CaCO3)

Bog Iron / Limonite Concretion

Goethite/Limonite mixture (FeO(OH)·nH2O)

Feldspar

KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8

Quartz Mineral

Silicon Dioxide (SiO2)

Mixed Quartz and River Pebbles (Stone Collection)

Mixed assortment containing mainly Silicon Dioxide (SiO2)

Quartz

SiO₂ (Silicon Dioxide)

Native Gold (in Jewelry)

Gold (Au)

Banded Calcite or Travertine

Calcium Carbonate (CaCO3)

Quartzite (River Cobble)

Quartzite (predominantly SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Citrine or Yellow Quartz

Silicon Dioxide (SiO2) with iron impurities

Rhodonite

Rhodonite (MnSiO3)

Marble

Recrystallized Calcite (CaCO3)