Yellow Jasper (Limonite-stained Chert)
Silicon Dioxide (SiO2) with Limonite/Goethite inclusions
Category
Browse mineral side rock specimens identified by the Rock Identifier community.
Yellow Jasper (Limonite-stained Chert)
Silicon Dioxide (SiO2) with Limonite/Goethite inclusions
Likely quartz-rich rock fragment
Quartz (SiO₂), possibly iron-stained quartz or quartzite
Almandine Garnet in Matrix
Almandine, Fe3Al2(SiO4)3
Dyed Agate
Silicon dioxide, SiO2
Quartz crystal (likely milky quartz)
Quartz, silicon dioxide (SiO₂)
Quartz crystal cluster
Quartz (silicon dioxide, SiO₂), likely milky or druzy quartz
Amethyst
Silicon Dioxide (SiO2) with iron impurities
Amethyst Cluster
Silicon Dioxide (SiO2) with iron impurities
Clear Quartz Crystal
Quartz (Silicon Dioxide, SiO2)
Garnet in Matrix (likely Almandine in Quartz/Mica Schist)
Almandine Garnet (Fe3Al2(SiO4)3) in Quartz-Feldspar host rock
Clear quartz crystal beads
Quartz (silicon dioxide, SiO₂)
Clear Quartz Crystal
Silicon Dioxide (SiO2)
Quartz Crystal
Silicon Dioxide (SiO2)
Garnet (Almandine)
Almandine (Fe3Al2(SiO4)3)
Blue Sapphire Crystal (Rough)
Corundum (Aluminum Oxide, Al2O3)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Silver (Morgan Dollar)
Native Silver (Ag) - 90% Silver, 10% Copper alloy
Quartz Crystal (specifically a Double-Terminated variety)
Silicon Dioxide (SiO2) - Low Quartz
Clear Quartz
Silicon Dioxide (SiO2)
Clear Quartz Crystal
Silicon Dioxide (SiO2)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Likely quartz crystal cluster
Quartz (silicon dioxide, SiO₂)
Clear Quartz (Druzy/Crystal Cluster)
Silicon Dioxide (SiO2)
Clear Quartz Cluster
Quartz (Silicon Dioxide - SiO2)
Faceted colorless gemstone, likely quartz (rock crystal)
Quartz, SiO₂
Likely polished/tumbled fossil shell or concretion
Indeterminate; possibly a fossil bivalve or gastropod in mineralized matrix
Possible black tourmaline (schorl) crystal
Schorl, NaFe²⁺₃Al₆(BO₃)₃Si₆O₁₈(OH)₄
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Herkimer Diamond
Quartz (Silicon Dioxide, SiO2)
Smoky Quartz
Silicon Dioxide (SiO2)
Quartz-rich breccia or vein quartz fragment
Quartz (SiO₂), likely with iron-oxide staining and attached host rock
Amethyst Quartz Crust
Crystalline Silicon Dioxide with Iron impurities (SiO2)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Quartz-rich rock fragment, possibly milky quartz with iron staining
Quartz (SiO₂), potentially vein quartz or quartz-bearing pegmatite
Garnet (Almandine)
Almandine (Fe3Al2(SiO4)3)
Amethyst
Silicon Dioxide (SiO2) with iron impurities
Amethyst
SiO2 (Silicon Dioxide with Iron impurities)
Gold
Gold (Native Au)
Citrine Geode Fragment
Citrine (Silicon Dioxide with Iron Impurities), SiO2
Quartz (Specifically Clear to Smoky Quartz point)
Silicon Dioxide (SiO2)
Garnet
Garnet Group (e.g., Almandine Fe3Al2(SiO4)3)
Epidote with Quartz
Ca2(Al,Fe)3(SiO4)3(OH) (Epidote) / SiO2 (Quartz)