Graphite
Graphite (Carbon, C)
Category
Browse mineral within a sedimentary rock specimens identified by the Rock Identifier community.
Graphite
Graphite (Carbon, C)
Tiger's Eye
Tiger's Eye (a variety of Chalcedony, which is a microcrystalline quartz with fibrous inclusions of oxidized crocidolite)
Grey River Pebble (Likely Quartz-rich or Limestone)
Clastic Sedimentary Rock (typically SiO2 or CaCO3 based)
Zoisite with Ruby
Anyolite (Calcium aluminum hydroxy silicate with Corundum) Ca2Al3(SiO4)3(OH)
Quartz
Quartz (Silicon Dioxide - SiO2)
Muscovite Mica
Muscovite (Potassium Mica) KAl2(AlSi3O10)(OH)2
Chert (Green variety)
Chert (Silicon Dioxide, SiO2)
Graphite-veined Quartzite
Meta-sedimentary Quartzite with Carbonaceous/Graphitic Inclusions (SiO2 + C)
White Quartz
Quartz (SiO2)
Chert / Flint
Chert (SiO2)
Chert Nodule
Microcrystalline Quartz (SiO2)
Dalmatian Stone
Dalmatian Jasper (actually a Peralkaline Igneous Rock)
Red Scoria (Lava Rock)
Scoria (Vesicular Basalt)
Limestone
Calcium Carbonate (CaCO3)
Chert Nodule (Flint)
Microcrystalline Quartz (SiO2)
Red Jasper
Silicon Dioxide (SiO2) with Hematite impurities
Banded Iron Formation
Banded Iron Formation (BIF)
Quartz Druzy (on Matrix)
Silicon Dioxide (SiO2)
Quartz Veined Siltstone or Graywacke
Clastic Sedimentary Rock with Quartz (SiO2) veining
Travertine
Calcareous Tufa / Travertine (CaCO3)
Milky Quartz
Quartz (SiO2)
Amethyst
Quartz (Silicon Dioxide) with Iron impurities, SiO2
Black Mountain Stone (Seiryu Stone)
Limestone with Calcite veins (CaCO3)
Andesite
Andesite (Intermediate Extrusive Volcanic Rock)
Vesuvianite (Idocrase)
Ca19(Al, Mg, Fe)13(SiO4)10(Si2O7)4(OH, F, O)10
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Chert (Nodule/Common Chert)
Microcrystalline quartz (SiO2)
Dragon Blood Jasper
Epidote with Red Piedmontite (Chalcedony/Quartz variant)
Jasper (Iron-rich Chert)
Silicon Dioxide (SiO2) with impurities of Hematite or Goethite
Unakite
Epidotized Granite
Chert (Pebble)
Microcrystalline silica (SiO2)
Amethyst
Amethyst (Silicon Dioxide - SiO2 with Iron impurities)
Amber
Succinicum (Formula: C10H16O)
Ferruginous Conglomerate
Conglomerate with Iron-Oxide Matrix (SiO2 + Fe2O3/FeO(OH))
River Rock (River Cobbles)
Fluvial Conglomerate Clasts (primarily composed of various minerals such as Quartz, SiO2)
Petrified Wood
Silicified Wood (SiO2)
André's Landing Rock (Sandstone Boulder)
Newark Supergroup Sandstone (likely Stockton Formation)
Pyrite in Shale
Iron Disulfide (FeS2) in Argillaceous Shale
Chert (Flint/Jasper variety)
Microcrystalline Quartz (SiO2)
Amethyst (Quartz)
Amethyst (Silicon Dioxide with Iron impurities), SiO2
Chert (or Chalcedony)
Chert (Microcrystalline Quartz, SiO2)