Chert (often referred to as 'Jasper' when red)
Chert (microcrystalline quartz, SiO₂)
Category
Browse mineral within a sedimentary rock specimens identified by the Rock Identifier community.
Chert (often referred to as 'Jasper' when red)
Chert (microcrystalline quartz, SiO₂)
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) within Metasedimentary or Igneous matrix
Sandstone
Arenite (SiO2 based)
Ocean Jasper
Spherulitic Chalcedony (SiO2)
Kimberlite with Diamond
Kimberlite (Porphyritic Peridotite)
Sandstone
Arenite
Quartz Vein in Host Rock (Gneiss/Schist)
Silicon Dioxide (SiO2) within a metamorphic matrix
Veined Quartz
SiO2 (Silicon Dioxide)
Carnelian
Chalcedony (cryptocrystalline quartz), SiO2
Granite
Granite
Emerald in Matrix (Quartz/Schist)
Beryl (Be₃Al₂Si₆O₁₈) with Chromium/Vanadium impurities
Milk Quartz (White) and Yellow Aventurine (Yellow)
Silicon Dioxide (SiO2)
Quartz (White/Milky with Iron Staining)
Silicon Dioxide (SiO2)
Eye Agate (Sulemani Agate)
Banded Chalcedony (SiO2)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Raw Diamond (Rough Uncut)
Diamond (C - pure carbon)
Flower Agate
Chalcedony (Silicon Dioxide, SiO2) with Opaque Spherulitic Inclusions
Sandstone
Clastic sedimentary rock (primarily SiO2)
Sandstone (Fossiliferous)
Clastic Sedimentary Rock (primarily SiO2)
Amethyst Geode
Amethyst (Silicon Dioxide), Formula: SiO2
Limonite (after Pyrite Pseudomorph)
Limonite (Hydrated Iron Oxide Mixture, FeO(OH)·nH2O)
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrous ferric oxide)
Granite
Granite (Felsic Plutonic Rock)
Fluorite with Quartz coating
Calcium Fluoride (CaF2) with Silicon Dioxide (SiO2)
Sandstone
Arenite (primarily SiO2 with various cementing agents)
Sandstone
Arenite (SiO2 based with various mineral cements)
Ocean Jasper
Orbicular Jasper (Silicon Dioxide, SiO2)
Chert (Iron-stained)
Microcrystalline Quartz (SiO2)
Sandstone
Arenite (SiO2 principal)
Tiger's Eye
Pseudomorph of Crocidolite (SiO2 with iron oxides)
Satin Spar (Selenite)
Gypsum (CaSO4·2H2O)
Dalmatian Stone
Peralkaline rhyolite
Herkimer Diamond
Quartz (Silicon Dioxide, SiO2)
Sandstone
Arenite (primarily SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
Septarian Nodule
Septarian Concretion (CaCO3 with Siderite/Limonite streaks)
Quartz Geode Fragment
Silicon Dioxide (SiO2)
Sandstone
Clastic sedimentary rock (primarily SiO2)
Red Granite
Phaneritic Felsic Igneous Rock
Grey River Stone (Gneiss/Schist mix)
Foliated Metamorphic Rock (variable mineral formula)
Hematite Nodules (Moqui Marbles style)
Iron Oxide (Fe2O3)