Black Sand (Magnetite Sand) rock specimen

Black Sand (Magnetite Sand)

Magnetite (Fe3O4)

mineral

Chert (Yellow Jasper/River Pebble) rock specimen

Chert (Yellow Jasper/River Pebble)

Microcrystalline Quartz (SiO2)

sedimentary

Tiger's Eye rock specimen

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

metamorphic

Moss Agate rock specimen

Moss Agate

Chalcedony (Silicon Dioxide) with dendritic inclusions (SiO2)

Mineral

Banded Agate (Crazy Lace/Mexican Agate Variety) rock specimen

Banded Agate (Crazy Lace/Mexican Agate Variety)

Silicon Dioxide (SiO2)

mineral

Red Moss Agate (Jasper) rock specimen

Red Moss Agate (Jasper)

Silicon Dioxide (SiO2) with Iron Oxide inclusions

sedimentary

Black Spinel rock specimen

Black Spinel

Magnesium Aluminum Oxide (MgAl2O4)

mineral

Banded Calcite (often sold as Mexican Onyx or Aragonite) rock specimen

Banded Calcite (often sold as Mexican Onyx or Aragonite)

Calcite/Aragonite (Calcium Carbonate, CaCO3)

sedimentary

Sunstone with Moonstone (Peach Moonstone) rock specimen

Sunstone with Moonstone (Peach Moonstone)

Orthoclase Feldspar (KAlSi3O8)

mineral

Honey Calcite rock specimen

Honey Calcite

Calcium Carbonate (CaCO3)

mineral

Ocean Jasper rock specimen

Ocean Jasper

Orbicular Jasper (SiO2)

sedimentary

Red Tiger Eye (or Polished Jasper Gneiss) rock specimen

Red Tiger Eye (or Polished Jasper Gneiss)

Silicon dioxide with crocidolite inclusions (SiO2)

metamorphic

Honey Calcite (Orange Onyx) rock specimen

Honey Calcite (Orange Onyx)

Calcium Carbonate (CaCO3)

mineral

Ocean Jasper rock specimen

Ocean Jasper

Orbicular Jasper (Silicon Dioxide - SiO2)

sedimentary

Angelite rock specimen

Angelite

Anhydrite (Calcium Sulfate, CaSO4)

mineral

Cream Marble (Speckled) rock specimen

Cream Marble (Speckled)

Metamorphosed Limestone (mainly CaCO3)

metamorphic

Golden Healer Quartz rock specimen

Golden Healer Quartz

Silicon Dioxide (SiO2) with iron oxide inclusions

mineral

Polished Ocean Jasper rock specimen

Polished Ocean Jasper

Orbicular Jasper (variety of Chalcedony/Quartz, SiO2)

mineral

Rhodonite rock specimen

Rhodonite

Manganese Inosilicate (Mn,Fe,Mg,Ca)SiO3

mineral

Rhodonite rock specimen

Rhodonite

Rhodonite (Mn,Fe,Mg,Ca)SiO3

mineral

Diorite rock specimen

Diorite

Diorite

igneous

Conglomerate rock specimen

Conglomerate

Conglomerate (clastic sedimentary rock)

sedimentary

Banded Slate or Siltstone with Quartz/Calcite Veins rock specimen

Banded Slate or Siltstone with Quartz/Calcite Veins

Protolith-derived Siltstone or Slate (varies based on degree of metamorphism)

metamorphic

Vesicular Basalt with Amygdaloidal Infill rock specimen

Vesicular Basalt with Amygdaloidal Infill

Basalt (Mafic Extrusive Igneous Rock)

igneous

Ferruginous Sandstone with Ironstone Concretion rock specimen

Ferruginous Sandstone with Ironstone Concretion

Goethite-rich Sandstone (FeO(OH))

sedimentary

Amygdaloidal Basalt rock specimen

Amygdaloidal Basalt

Amygdaloidal Basalt (Ca-rich Plagioclase, Pyroxene, and Olivine)

igneous

Basalt with Amygdaloidal Inclusions rock specimen

Basalt with Amygdaloidal Inclusions

Aphanitic Mafic Volcanic Rock (Basalt)

igneous

Basalt with Porphyritic Texture rock specimen

Basalt with Porphyritic Texture

Porphyritic Basalt

igneous

Chondrite Meteorite rock specimen

Chondrite Meteorite

L or H type Ordinary Chondrite

igneous

Quartz Geode Fragment rock specimen

Quartz Geode Fragment

Silicon Dioxide (SiO2)

mineral

Basalt with Porphyritic Texture rock specimen

Basalt with Porphyritic Texture

Porphyritic Basalt

igneous

Chert (Jasper/Agate variety) rock specimen

Chert (Jasper/Agate variety)

Microcrystalline Quartz (SiO2)

sedimentary

Chert (Chalcedony/Jasper) rock specimen

Chert (Chalcedony/Jasper)

Microcrystalline Quartz (SiO2)

sedimentary

Yellow Chert or Jasper rock specimen

Yellow Chert or Jasper

Microcrystalline Quartz (SiO2)

sedimentary

Chrysocolla rock specimen

Chrysocolla

Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O)

mineral

Green Aventurine rock specimen

Green Aventurine

Aventurine Quartz (SiO2 with Fuchsite inclusions)

metamorphic

Septarian Nodule (Septarian Dragon Stone) rock specimen

Septarian Nodule (Septarian Dragon Stone)

Septarian Concretion (CaCO3 + Al2Si2O5(OH)4)

sedimentary

Garnet rock specimen

Garnet

Garnet Group (Silicate Minerals), formula varies e.g., Almandine Fe3Al2(SiO4)3

mineral

Orca Agate rock specimen

Orca Agate

Chalcedony (SiO2) with various inclusions

mineral

Orange Calcite and White Calcite rock specimen

Orange Calcite and White Calcite

Calcium Carbonate (CaCO3)

mineral

Blue Apatite rock specimen

Blue Apatite

Apatite group (Ca5(PO4)3(F,Cl,OH))

mineral

Ruby in Zoisite (Anyolite) rock specimen

Ruby in Zoisite (Anyolite)

Anyolite (Combination of Corundum and Zoisite)

metamorphic