Tektite (Indochinite)
Tektite (Amorphous Meteoritic Glass)
igneous
Category
Organic Material (Likely A Fruit Or Berry)
Browse organic material (likely a fruit or berry) specimens identified by the Rock Identifier community.
Graphite
Graphite (Native Carbon), Formula: C
Metamorphic
Vesicular Basalt with Lichen
Vesicular Basalt
igneous
Chert (often called Flint when dark)
Sedimentary cryptocrystalline quartz (SiO2)
sedimentary
Amber
Succinite
Organic Mineral
Chert (Arrowhead Preform or Point)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Blue Onyx (Dyed Agate)
Cryptocrystalline Quartz (SiO2) with artificial pigment
mineral
Wishing Stone (Basalt/Greywacke with Quartz Vein)
Basalt or Siltstone with SiO2 (Quartz) hydrothermal intrusion
igneous/sedimentary
Drill Core Samples (Varied Lithology)
Multi-lithological core samples (containing potential granite, marble, and phyllite/schist sequence)
igneous, sedimentary, and metamorphic
Chert (River Pebble)
Microcrystalline silicon dioxide (SiO2)
sedimentary
Sandstone (Grooved/Weathered)
Arenite (composed primarily of Quartz and Lithic fragments)
sedimentary
Amazonite
Amazonite (KAlSi3O8)
mineral
Orange Quartz (Citrine or Iron-stained Quartz)
Silicon Dioxide (SiO2)
mineral
Orange Quartzite / Quartz River Siltstone
Quartzite (SiO2)
metamorphic
Amethyst with Marcasite accents
Amethyst (Silicon Dioxide SiO2) and Marcasite (Iron Sulfide FeS2)
mineral
Amber and Citrine Quartz
Succinite (Amber) and Silicon Dioxide (SiO2 / Citrine)
mineral
Agate
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Amber in Matrix
Succinite (Carbon-based organic polymer)
Organic (Sedimentary context)
Pink Coral
Corallium rubrum (Calcium Carbonate, CaCO3)
mineral
Pearl
Calcium Carbonate (CaCO3) + Conchiolin
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Green Chert
Microcrystalline Quartz (SiO2)
sedimentary
Turquoise and Red Coral (with Grizzly Bear Claw)
Turquoise (CuAl6(PO4)4(OH)8·4H2O) and Precious Coral (Corallium rubrum)
mineral
Amber
Organic gemstone (Succinite)
mineral
Pearl
Calcium Carbonate (primarily Aragonite and Calcite), CaCO3
mineral
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Amber
Succinite (fossilized resin); C10H16O
mineraloid
Shungite
Non-crystalline carbon (high-carbon metamorphic rock)
metamorphic
Red Chert
Microcrystalline Quartz (SiO2)
sedimentary
Phantom Quartz with Chlorite and Hematite inclusions
Silicon Dioxide (SiO2) with inclusions of Chlorite group minerals and Hematite (Fe2O3)
mineral
Porphyritic Rhyolite
Porphyritic Rhyolite (compositionally similar to granite)
igneous
Geode (Unopened)
Silicon Dioxide (SiO2) in sedimentary vugs
sedimentary
Pearl
Calcium Carbonate (Aragonite) with Conchiolin; formula: CaCO3
mineral
Glauconitic Sandstone
Glauconitic arenite (contains (K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2)
sedimentary
Glauconitic Sandstone
Glauconitic Sandstone (contains (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2)
sedimentary
Black Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Moqui Marbles
Iron Oxide Concretion (Hematite/Goethite)
sedimentary
Blue Apatite
Apatite, Ca5(PO4)3(F,Cl,OH)
mineral
Chalcedony (Common Opal variant)
Silicon dioxide (SiO2) with varying levels of hydration
mineral
Fossiliferous Limestone with Brachiopod shell
Calcium carbonate (CaCO3)
sedimentary