Chert (specifically Red Chert / Jasper nodule)
Silicon dioxide (SiO2)
Category
Browse mineral, specifically an iron ore specimens identified by the Rock Identifier community.
Chert (specifically Red Chert / Jasper nodule)
Silicon dioxide (SiO2)
Banded Gneiss (River Rock/Pebble)
Gneiss (specifically a banded variety often found as a river rock)
Ironstone Concretion (likely)
Goethite/Hematite/Limonite cemented sediment
Green Fluorite
Calcium Fluoride (CaF2)
Amber
Succinite
Malachite
Copper Carbonate Hydroxide [Cu2CO3(OH)2]
Dioptase
Dioptase (CuSiO3 · H2O)
Quartz (specifically Clear and Rose Quartz)
Silicon Dioxide (SiO2)
Granitic Pegmatite
Coarse-grained Granite (KAlSi3O8 + SiO2)
Chert (Nodule)
Microcrystalline quartz (SiO2)
Mookaite Jasper
Siliceous sedimentary rock (variety of Jasper/Chert)
Rhodonite, Gray Moonstone, and White Feldspar Mix
Multiple: MnSiO3 (Rhodonite), (K,Na)AlSi3O8 (Feldspar/Moonstone)
Cinnabar in Quartz
Silicon Dioxide (Quartz, SiO2) with Mercury Sulfide inclusions (Cinnabar, HgS)
Aquamarine
Beryl (Be3Al2Si6O18)
Arsenopyrite in Quartz Matrix
Arsenopyrite (FeAsS)
Chert (specifically Black Chert / Flint)
Silicon Dioxide (SiO2)
Septarian Nodule (Dragon Stone)
Septarian Geode (CaCO3 + Mg + Fe)
Chert (specifically Green Chert/Jasper)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
Chert (specifically Tan/Yellow Chert)
Chert (Microcrystalline or Cryptocrystalline Silica, SiO2)
Malachite
Malachite - Cu2CO3(OH)2
Fluorite (Polished Point/Tower)
Calcium Fluoride (CaF2)
Bumblebee Jasper
Volcanic Tuff (mixture of Quartz, Sulfur, Hematite, and Orpiment)
Chert (specifically Chert Nodule/Flint)
Chert (Silicon Dioxide, SiO2)
Amber
Succinite (Fossilized Tree Resin)
Eudialyte
Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
Fluorite (often referred to as Rainbow Fluorite)
Fluorite (Calcium Fluoride, CaF2)
Green Fluorite
Calcium Fluoride (CaF2)
Fluorite
Fluorite (Calcium Fluoride - CaF2)
Fluorite (Purple Octahedron)
Calcium Fluoride (CaF2)
Fluorite (Rainbow Fluorite Tower)
Fluorite (Calcium Fluoride, CaF2)
Azurite
Azurite - Copper Carbonate Hydroxide [Cu3(CO3)2(OH)2]
Gneiss (specifically Banded Gneiss)
Gneiss
Chrysocolla
Hydrated copper phyllosilicate, Cu2-xAlx(H2-xSi2O5)(OH)4·n(H2O)
Azurite
Azurite (Cu3(CO3)2(OH)2)
Green Fluorite
Fluorite (Calcium Fluoride - CaF2)
River/Stream Pebble
Clast / Detrital Grain / Rounded Sedimentary Particle (Compositionally variable, commonly Quartz, Feldspar, Chert, or other resistant rock fragments)
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
Rhodonite
Manganese Silicate (Mn, Fe, Mg, Ca)SiO3
Ocean Jasper
Spherulitic Chalcedony (SiO2)
Black Pearl (Tahitian Type)
Aragonite / Conchiolin composite (CaCO3)
Galena
Lead(II) Sulfide (PbS)
Limestone (specifically fossiliferous/skeletal limestone)
Calcium Carbonate (CaCO3)