Milky Quartz rock specimen

Milky Quartz

Quartz / Silicon Dioxide (SiO2)

mineral

Chalcedony (Agate Pebble) rock specimen

Chalcedony (Agate Pebble)

Silicon Dioxide (SiO2)

mineral

Milky Quartz rock specimen

Milky Quartz

Silicon Dioxide (SiO2)

mineral

Labradorite (Larvikite variety) rock specimen

Labradorite (Larvikite variety)

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

igneous

Banded Calcite (often sold as 'Green Onyx') rock specimen

Banded Calcite (often sold as 'Green Onyx')

Calcite (Calcium Carbonate, CaCO3)

sedimentary

Blue Apatite rock specimen

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

mineral

Ocean Jasper (Orbicular Jasper) rock specimen

Ocean Jasper (Orbicular Jasper)

Silicon Dioxide (SiO2) with iron and other impurities

sedimentary

Chrysocolla and Malachite Beads rock specimen

Chrysocolla and Malachite Beads

Hydrated copper silicates (Chrysocolla) and Copper carbonate hydroxide (Malachite)

mineral

Sandstone rock specimen

Sandstone

Arenite (primarily SiO2)

sedimentary

Quartzite Pebble rock specimen

Quartzite Pebble

Metamorphosed Quartz Sandstone (SiO2)

metamorphic

Quartz Pebble rock specimen

Quartz Pebble

Silicon Dioxide (SiO2)

mineral

Quartz (Iron-stained) rock specimen

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

mineral

Quartz (River Pebble) rock specimen

Quartz (River Pebble)

Silicon Dioxide (SiO2)

mineral

Quartzite Pebble rock specimen

Quartzite Pebble

Metamorphosed Quartz Sandstone (SiO2)

metamorphic

Sandstone rock specimen

Sandstone

Arenite (primarily SiO2)

sedimentary

Picture Jasper rock specimen

Picture Jasper

Silicon Dioxide (SiO2) with impurities

sedimentary

Rose Quartz rock specimen

Rose Quartz

SiO2 (Silicon Dioxide)

mineral

Copper-bearing Quartz (with Malachite and Iron Oxides) rock specimen

Copper-bearing Quartz (with Malachite and Iron Oxides)

Quartz (SiO2) with Malachite (Cu2CO3(OH)2) and Hematite/Limonite (Fe2O3)

Mineral Specimen

Quartzite (or Iron-Stained Quartz Pebble) rock specimen

Quartzite (or Iron-Stained Quartz Pebble)

Silicon Dioxide (SiO2) with Ferric Oxide inclusions

metamorphic

Carnelian (Chalcedony) rock specimen

Carnelian (Chalcedony)

Silicon Dioxide (SiO2)

mineral

Milky Quartz rock specimen

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

mineral

Sandstone (likely Quartzose Sandstone) rock specimen

Sandstone (likely Quartzose Sandstone)

Arenite (composed primarily of SiO2)

sedimentary

Conglomerate rock specimen

Conglomerate

Clastic sedimentary conglomerate

sedimentary

Conglomerate rock specimen

Conglomerate

Conglomerate (clastic sedimentary rock)

sedimentary

Limonite after Pyrite (Prophecy Stone or Ironstone Concretion) rock specimen

Limonite after Pyrite (Prophecy Stone or Ironstone Concretion)

Goethite/Limonite pseudomorph after Pyrite/Marcasite (FeO(OH)·nH2O)

mineral

Conglomerate rock specimen

Conglomerate

Conglomerate (SiO2 dominant in clasts)

sedimentary

Agate rock specimen

Agate

Silicon Dioxide (SiO2) - Microcrystalline Quartz

sedimentary

Ferruginous Breccia rock specimen

Ferruginous Breccia

Breccia with Iron-rich (Hematite/Goethite) Matrix

sedimentary

Red Garnet (likely Almandine) rock specimen

Red Garnet (likely Almandine)

Almandine (Fe3Al2(SiO4)3)

mineral

Amygdaloidal Basalt rock specimen

Amygdaloidal Basalt

Amygdaloidal Basalt (Mafic Volcanic Rock)

Igneous

Conglomerate rock specimen

Conglomerate

Conglomerate (SiO2 primary clasts with lithic matrix)

sedimentary

Conglomerate rock specimen

Conglomerate

Conglomerate (Sedimentary rock)

sedimentary

Conglomerate rock specimen

Conglomerate

Conglomerate (clastic sedimentary rock)

sedimentary

Basalt with Iron Oxidation rock specimen

Basalt with Iron Oxidation

Mafic Igneous Basalt

igneous

Sandstone (Quartzose) rock specimen

Sandstone (Quartzose)

Arenite (primarily SiO2)

sedimentary

Quartzite rock specimen

Quartzite

Quartzite (primarily SiO2)

metamorphic

Pink Granite rock specimen

Pink Granite

Phaneritic Felsic Intrusive Igneous Rock

igneous

Glacial Erratic (Sandstone/Quartzite) rock specimen

Glacial Erratic (Sandstone/Quartzite)

Glacial Erratic specimen (likely Orthoquartzite or Feldspathic Sandstone)

sedimentary or metamorphic

Gneiss (specifically Banded Gneiss) rock specimen

Gneiss (specifically Banded Gneiss)

Gneiss

metamorphic

Limestone rock specimen

Limestone

Calcium Carbonate (CaCO3)

sedimentary

Diorite rock specimen

Diorite

Diorite (Intermediate intrusive igneous rock)

igneous

Basalt rock specimen

Basalt

Basalt (Mafic volcanic rock)

igneous