Tourmaline (Multi-colored)
Complex Borosilicate (Na,Ca)(Li,Mg,Al,Fe)3Al6(BO3)3Si6O18(OH)4
Category
Browse marble specimens identified by the Rock Identifier community.
Tourmaline (Multi-colored)
Complex Borosilicate (Na,Ca)(Li,Mg,Al,Fe)3Al6(BO3)3Si6O18(OH)4
Orange Calcite
Calcium Carbonate (CaCO3)
Yellow Calcite
Calcium Carbonate (CaCO3)
Botryoidal calcite (likely calcite concretion)
Calcite, calcium carbonate (CaCO₃)
Quartzite
Quartzite, predominantly crystalline SiO₂
Jasper
Silicon Dioxide (SiO2) with iron oxide impurities
Limestone with Calcite Veining
Calcium Carbonate (CaCO3) - Biogenic/Chemical Sedimentary Rock
Quartzite Pebble
Quartzite (SiO2)
Calcite
Calcite (Calcium Carbonate - CaCO3)
Quartz Geode (partially formed)
Silicon Dioxide (SiO2)
Calcite (Optical Grade/Iceland Spar)
Calcium Carbonate (CaCO3)
Quartzite
Quartzite (primarily SiO2)
Orange Calcite
Calcium Carbonate (CaCO3)
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals, Mg3Si2O5(OH)4)
Quartzite Arrowhead
Quartzite (SiO2 silicon dioxide)
Quartzite
Quartzite (SiO2)
Quartzite
Quartzite (primarily SiO2)
Quartzite with Feldspar
Quartzite (mainly SiO2) with inclusions of Potassium Feldspar (KAlSi3O8)
Quartzite pebble
Quartzite (SiO2)
Honey Calcite
Calcium Carbonate (CaCO3)
Silicon
Crystalline Silicon (Si)
Yellow Calcite
Calcium Carbonate (CaCO3)
Banded Calcite (Mexican Onyx)
Calcium Carbonate (CaCO3)
Orange Calcite
Calcite (Calcium Carbonate, CaCO3)
Ironstone Concretion (Moqui Marble)
Iron-oxide concretion (Fe2O3 / FeO(OH))
Pink Calcite
Calcium Carbonate (CaCO3)
Yellow Calcite
Calcite (Calcium Carbonate, CaCO3)
White tumbled stone, likely quartz or calcite
Indeterminate; possibly quartz (SiO₂) or calcite (CaCO₃)
Quartzite
Quartzite (chiefly SiO2)
Quartzite Pebble
Quartzite (composed primarily of Silica, SiO2)
Quartzite
Quartzite (Silicon Dioxide, SiO2)
Quartzite
Quartzite (primarily SiO2)
Graphite
Graphite (Native Carbon, C)
Quartzite with Iron Inclusions
Quartzite (primarily SiO2)
Quartzite River Rock
Metamorphic Quartzite (primarily SiO2)
Quartzite
Quartzite (Mainly SiO2)
Quartzite
Quartzite (primarily SiO2)
Ruby / Red Tourmaline
Corundum (Al2O3) or Elbaite (Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)4)
Lapis Lazuli
Lapis Lazuli (Complex aggregate of Lazurite, Calcite, and Pyrite)
Ruby (Raw Corundum)
Al2O3 (Aluminum Oxide)
Orange Calcite
Calcium Carbonate (CaCO3)
Orange Calcite
Calcium Carbonate (CaCO3)