Metamorphic Rock (Composed Of Multiple Minerals)

Diamond

Diamond (pure Carbon, C)

Sandstone

Sandstone (Clastic Sedimentary Rock)

Sandstone

Arenite (composed primarily of SiO2, or Silicon Dioxide)

Sandstone

Arenite (composed primarily of Quartz: SiO2)

Serpentine Schist with Quartz Vein

Serpentine Schist (a type of Metamorphic rock). The white band is likely Quartz (SiO2).

Orthoclase Feldspar

KAlSi3O8 (Potassium Aluminum Silicate)

Granite

Granite

Granite

Phaneritic Igneous Rock (composed of quartz, alkali feldspar, and plagioclase)

Petrified Wood

Silicified Wood (SiO2)

Sandstone (Ferruginous)

Arenite (composed primarily of SiO2 with Fe2O3 cement)

Petrified Wood (Silicified Wood)

Silicified Wood / Silicon Dioxide (SiO2)

Rhodonite

Rhodonite (Mn,Fe,Mg,Ca)SiO3

Lapis Lazuli

Lapis lazuli (a metamorphic rock primarily composed of Lazurite, (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Moqui Marble (Ironstone Concretion)

Goethite/Hematite Concretion (Fe2O3 / FeO(OH))

Chalcedony (Botryoidal)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Banded Gneiss

Gneiss (pronounced 'nice')

Banded Gneiss

Gneiss (Metamorphic high-grade, predominantly SiO2, Al2O3, K2O, Na2O)

Sandstone (with Iron concretions/staining)

Arenite (composed primarily of Quartz and Feldspar with Iron Oxide cement)

Garnet-Mica Schist

Schist (variety with Almandine Garnet, Fe3Al2(SiO4)3)

Epidosite (Epidote-rich rock)

Epidosite (consisting primarily of Epidote: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH))

Gneiss

Gneiss (Metamorphic rock of variable composition, typically SiO2 rich)

Mica Schist

Mica Schist (primarily Muscovite and Biotite phyllosilicates)

Yellow Apatite Sphere (Polished)

Fluorapatite / Ca5(PO4)3F

Lapis Lazuli

Lazurite-dominant rock, (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2

Basalt (River Pebble)

Basalt (extrusive mafic rock)

Green Aventurine

Quartz with Fuchsine inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)

Limonite-stained Quartz / Quartzite

Silicon Dioxide (SiO2) with iron hydroxides (FeO(OH)·nH2O)

Granite

Granite (composed mainly of Quartz, Feldspar, and Mica)

Gossan (Iron Hat) with Quartz and Chlorite

Limonite/Goethite-rich Gossan (FeO(OH)·nH2O) with inclusions of Quartz and Chlorite

Quartzite (or Ferruginous Quartzite)

Metamorphosed Quartz Sandstone (SiO2 with Fe2O3 impurities)

Gneiss

High-grade regional metamorphic rock (Foliated)

Banded Onyx (Green Onyx)

Banded Calcite or Travertine (CaCO3)

Red Sandstone

Arenite (primarily Quartz with Hematite cement)

Quartz Pebble

Silicon Dioxide (SiO2)

Granite

Phaneritic plutonic rock (primarily Quartz, Feldspar, and Mica)

Basalt

Mafic Igneous Rock (composed primarily of plagioclase feldspar and pyroxene)

Petrified Wood

Silicified Wood (SiO2)

Quartzite

Quartzite (composed primarily of SiO2)

Quartzite Cobble

Quartzite (composed primarily of SiO2)

Quartzite

Quartzite (composed primarily of SiO2)

Pebble (likely a type of sandstone or quartzite pebble)

Clastic Sediment (specifically, a rudite-sized clast). If the pebble is composed of a specific rock type, its scientific name would be that rock type (e.g., 'Quartzite pebble', 'Granite pebble', 'Chert pebble'). Given its appearance, it is likely a metamorphic quartzite pebble or a hard sandstone pebble.

Ruby in Fuchsite

Corundum (Al2O3) in Fuchsite (K(Al,Cr)3Si3O10(OH)2)