Pearl rock specimen

Pearl

Aragonite (CaCO3) with Conchiolin

mineral

Gold rock specimen

Gold

Native Gold (Au)

mineral

Diamond (set in jewelry) rock specimen

Diamond (set in jewelry)

Diamond (Carbon, C)

mineral

Pearl (Biogenic Mineraloid) rock specimen

Pearl (Biogenic Mineraloid)

Calcium carbonate (Aragonite) and Conchiolin, CaCO3

mineral

Pearl rock specimen

Pearl

Pearl (Calcium Carbonate with organic conchiolin, CaCO3)

mineral

Pearl (Biogenic Mineral) rock specimen

Pearl (Biogenic Mineral)

Calcium Carbonate (primarily Aragonite) with Conchiolin; CaCO3

mineral

Quartzite rock specimen

Quartzite

Quartzite (primarily SiO2)

metamorphic

Pearl rock specimen

Pearl

Aragonite / Calcium Carbonate (CaCO3)

mineraloid

Black Freshwater Pearls rock specimen

Black Freshwater Pearls

Biogenic Calcium Carbonate (Aragonite/Calcite), CaCO3

mineral

Gold rock specimen

Gold

Native Gold (Au)

mineral

Black Pearl (Tahitian Pearl) rock specimen

Black Pearl (Tahitian Pearl)

Aragonite / Calcite (CaCO3) with Conchiolin

mineral

Sandstone (likely Calcareous or Quartz-rich) rock specimen

Sandstone (likely Calcareous or Quartz-rich)

Arenite (SiO2 based typically)

sedimentary

Greenschist (Greenstone River Pebble) rock specimen

Greenschist (Greenstone River Pebble)

Greenschist (Chlorite Schist)

metamorphic

Greenstone rock specimen

Greenstone

Chlorite schist / Meta-basalt

metamorphic

Sandstone (likely Quartzose Sandstone) rock specimen

Sandstone (likely Quartzose Sandstone)

Arenite (composed primarily of SiO2)

sedimentary

Chert rock specimen

Chert

Chert (Silicon Dioxide, SiO2)

sedimentary

Sandstone (Greywacke) rock specimen

Sandstone (Greywacke)

Arenite / Clastic Sedimentary Rock

sedimentary

Quartzite rock specimen

Quartzite

Quartzite (primarily SiO2)

metamorphic

Quartzite rock specimen

Quartzite

Quartzite (primarily SiO2)

metamorphic

Jasper rock specimen

Jasper

Silicon dioxide (SiO2)

sedimentary

Sandstone (with manganese staining) rock specimen

Sandstone (with manganese staining)

Clastic sedimentary rock (primarily SiO2)

sedimentary

Sandstone (Quartz-rich) rock specimen

Sandstone (Quartz-rich)

Arenite (composed primarily of SiO2)

sedimentary

Chert (Field-collected Arrowhead-shaped Fragment) rock specimen

Chert (Field-collected Arrowhead-shaped Fragment)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

sedimentary

Basalt rock specimen

Basalt

Basalt (Volcanic Mafic Rock)

igneous

Quartzite Pebble rock specimen

Quartzite Pebble

Metamorphic rock predominantly composed of Quartz (SiO2)

metamorphic

Marble rock specimen

Marble

Metamorphosed Limestone (calcite formulation CaCO3)

metamorphic

Schist rock specimen

Schist

Mica Schist

metamorphic

Quartzite rock specimen

Quartzite

Quartzite (primarily SiO2)

metamorphic

Limestone rock specimen

Limestone

Calcareous sedimentary rock (CaCO3)

sedimentary

Tektite (Indochinite) rock specimen

Tektite (Indochinite)

Tektite (Amorphous Meteoritic Glass)

igneous

Fossiliferous Limestone (Shell Fragment) rock specimen

Fossiliferous Limestone (Shell Fragment)

Biogenic Limestone (Calcium Carbonate / CaCO3)

sedimentary

Limestone (River Pebble) rock specimen

Limestone (River Pebble)

Sedimentary Calcium Carbonate (CaCO3)

sedimentary

Azurite with Malachite and Limonite rock specimen

Azurite with Malachite and Limonite

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

mineral

Jade (Jadeite or Nephrite) rock specimen

Jade (Jadeite or Nephrite)

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

metamorphic

Jade (Jadeite/Nephrite) rock specimen

Jade (Jadeite/Nephrite)

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

metamorphic

Gold rock specimen

Gold

Native Gold (Au)

mineral

Black Onyx rock specimen

Black Onyx

Onyx (Silicon Dioxide, SiO2)

mineral

Native Gold (in the form of jewelry) rock specimen

Native Gold (in the form of jewelry)

Gold (Au)

mineral

Ruby (set in a gold pendant) rock specimen

Ruby (set in a gold pendant)

Ruby (Variety of Corundum, Al2O3)

mineral

Ruby and Diamond in Gold Setting rock specimen

Ruby and Diamond in Gold Setting

Corundum (Al2O3) and Diamond (C)

mineral

Ruby and Diamond Heart Pendant rock specimen

Ruby and Diamond Heart Pendant

Corundum (Al2O3) and Diamond (C)

mineral

Hematite rock specimen

Hematite

Iron(III) oxide (Fe2O3)

mineral