Quartz Sandstone Pebble
Sandstone (SiO2 dominated)
Category
Browse synthetic (man made glass) specimens identified by the Rock Identifier community.
Quartz Sandstone Pebble
Sandstone (SiO2 dominated)
Polished white chalcedony or milky quartz pebble
Chalcedony, microcrystalline quartz (SiO₂), possibly with iron-oxide staining or a minor mineral inclusion
Mica Schist
Mica Schist (principally Biotite/Muscovite, Quartz, and Feldspar)
Coquina
Bioclastic Limestone (composed primarily of CaCO3)
Coquina / Fossiliferous Limestone
Calcareous bioclastic sedimentary rock (CaCO3)
Amethyst
SiO2 (Silicon Dioxide)
Chert / Flint
Silicon Dioxide (SiO2)
Chert (Jasper/Flint variety)
Microcrystalline quartz (SiO2)
Pink Granite (Alkali-feldspar Granite)
Felsic intrusive igneous rock (composition: KAlSi3O8, SiO2, NaAlSi3O8)
Sandstone (Ferruginous)
Arenite (SiO2 with Fe2O3 inclusions)
Sandstone
Arenite (SiO2 based)
Limestone Pebble
Sedimentary Calcium Carbonate (CaCO3)
Chalcedony (Agate/Chert variety)
Silicon Dioxide (SiO2)
Cubic Zirconia (CZ) Jewelry
Zirconium dioxide (ZrO2)
Diamond (faceted)
Diamond (Pure Carbon, C)
Diamond
C (Carbon)
Coal (Bituminous Coal)
Caustobiolith / Sedimentary Rock
Cubic Zirconia (CZ)
Cubic Zirconium Dioxide (ZrO2)
Cubic Zirconia (CZ)
Cubic Zirconium Dioxide (ZrO2)
Chrysocolla
Hydrated copper phyllosilicate, (Cu,Al)2H2Si2O5(OH)4·nH2O
Seven Chakra Bonded Stone
Bonded composite of Red Jasper, Carnelian, Tiger's Eye, Aventurine, Lapis Lazuli, Amethyst, and Clear Quartz
Banded Gneiss
Gneiss (Foliated Metamorphic Rock)
Granite
Intrusive Felsic Igneous Rock (primarily Quartz and Feldspar)
Chert Arrowhead
Cryptocrystalline Quartz (SiO2)
Sunstone (Aventurine Feldspar)
(Ca,Na)((Al,Si)2Si2O8) with inclusions of Cu or Fe2O3
Diamond
Diamond (pure Carbon, C)
Diamond
Carbon (C)
Rough Diamond
Pure Carbon (C)
Chert
Microcrystalline Quartz (SiO2)
Sunstone
(Ca,Na)((Al,Si)2Si2O8) - Plagioclase Feldspar
Pearl
Biogenic Calcium Carbonate (Aragonite/Calcite), CaCO3
Sandstone (with potential Arkose/Lithic characteristics)
Arenite (Sedimentary rock composed of sand-sized grains)
Chert / Flint
Cryptocrystalline quartz (SiO2)
Diamond in Kimberlite
Diamond in Kimberlite Matrix (Diamond: C, Kimberlite: complex Potassic Peridotite)
Pearl
Aragonite / Calcium Carbonate (CaCO3)
Granite
Phaneritic Felsic Intrusive Igneous Rock
Diamond (Cluster Ring)
Carbon (C)
Granite
Phaneritic Plutonic Felsic Rock (SiO2, KAlSi3O8, NaAlSi3O8, CaAl2Si2O8)
Chert (often called Flint)
Chert (Microcrystalline or cryptocrystalline Silica, SiO2)
Flower Agate
Chalcedony (SiO2) with inclusions
Basalt
Basalt (Mafic volcanic rock)
Coquina
Bioclastic Limestone (Coquina)