Hematite Nodules (Moqui Marbles style) rock specimen

Hematite Nodules (Moqui Marbles style)

Iron Oxide (Fe2O3)

mineral

Pink Granite rock specimen

Pink Granite

Granite (Alkali-feldspar granite)

igneous

Red Granite rock specimen

Red Granite

Phaneritic Felsic Igneous Rock

igneous

Quartz (likely Herkimer Diamond style) rock specimen

Quartz (likely Herkimer Diamond style)

Silicon Dioxide (SiO2)

mineral

Almandine Garnet rock specimen

Almandine Garnet

Almandine, Fe3Al2(SiO4)3

mineral

Diamond rock specimen

Diamond

Diamond (pure Carbon, C)

mineral

Porphyry rock specimen

Porphyry

Porphyritic Rock

igneous

Quartzite rock specimen

Quartzite

Quartzite (90%+ SiO2)

metamorphic

Red Jasper rock specimen

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

mineral

Granite rock specimen

Granite

Phaneritic plutonic rock (SiO2 range 65-75%)

igneous

Serpentinite rock specimen

Serpentinite

Serpentinite (group of hydrous magnesium iron phyllosilicates)

metamorphic

Granite rock specimen

Granite

Phaneritic Felsic Igneous Rock

igneous

Quartzite with Iron Inclusions rock specimen

Quartzite with Iron Inclusions

Metamorphosed Quartz (SiO2)

metamorphic

Basalt rock specimen

Basalt

Mafic Igneous Rock (composed primarily of Pyroxene and Plagioclase Feldspar)

igneous

Quartzite Pebble rock specimen

Quartzite Pebble

Quartzite (mostly SiO2)

metamorphic

Porous Quartzite rock specimen

Porous Quartzite

Metamorphosed Quartz-rich Sandstone (SiO2)

metamorphic

Eclogite rock specimen

Eclogite

Eclogite (Pyrope-Omphacite rock)

metamorphic

Granodiorite rock specimen

Granodiorite

Granodiorite

igneous

Eclogite rock specimen

Eclogite

Eclogite (Pyrope garnet and Omphacite pyroxene)

metamorphic

Basalt (River Rock Cobble) rock specimen

Basalt (River Rock Cobble)

Extrusive mafic igneous rock

igneous

Diamond rock specimen

Diamond

Diamond (pure Carbon, C)

mineral

Chert (Jasper variety) rock specimen

Chert (Jasper variety)

Microcrystalline quartz (SiO2)

sedimentary

Pumice rock specimen

Pumice

Pumice (Amorphous volcanic glass)

igneous

Basalt rock specimen

Basalt

Basalt

igneous

Rutilated Quartz (with Garnet pendant) rock specimen

Rutilated Quartz (with Garnet pendant)

Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions

mineral

Rutilated Quartz rock specimen

Rutilated Quartz

Silicon Dioxide (SiO2) with inclusions of Titanium Dioxide (TiO2)

mineral

Rutilated Quartz rock specimen

Rutilated Quartz

Silicon Dioxide with Titanium Dioxide (SiO2 with TiO2 inclusions)

mineral

Schist rock specimen

Schist

Mica Schist

metamorphic

Schist rock specimen

Schist

Mica Schist

metamorphic

Chert (specifically a flint nodule component) rock specimen

Chert (specifically a flint nodule component)

Microcrystalline quartz (SiO2)

sedimentary

Chalcedony / Agate rock specimen

Chalcedony / Agate

Silicon Dioxide (SiO2)

mineral

Unakite rock specimen

Unakite

Unakite (altered granite)

metamorphic

Quartzite rock specimen

Quartzite

Quartzite (primarily SiO2)

metamorphic

Quartzite rock specimen

Quartzite

Silicon Dioxide (SiO2)

metamorphic

Azurite and Malachite on Matrix rock specimen

Azurite and Malachite on Matrix

Cu3(CO3)2(OH)2 (Azurite) and Cu2CO3(OH)2 (Malachite)

mineral

Red Sandstone rock specimen

Red Sandstone

Arenite (Ferruginous Sandstone)

sedimentary

Quartz Pebble rock specimen

Quartz Pebble

Silicon Dioxide (SiO2)

mineral

Amazonite rock specimen

Amazonite

K(AlSi3O8), Microcline

mineral

Limonite/Goethite rock specimen

Limonite/Goethite

Goethite: alpha-FeO(OH), Limonite: FeO(OH)nH2O

mineral

Concretion (Sandstone) rock specimen

Concretion (Sandstone)

Sandstone Concretion

sedimentary

Slate with Iron Staining rock specimen

Slate with Iron Staining

Low-grade Metamorphic Mudstone (Slate)

metamorphic

Yellow Jasper rock specimen

Yellow Jasper

Silicon Dioxide (SiO2) with iron hydroxides (Goethite)

sedimentary