Amber
Succinite (fossilized resin)
Organic Mineraloid
Category
Mineraloid (Human Made Geological Specimen)
Browse mineraloid (human made geological specimen) specimens identified by the Rock Identifier community.
Amber (Burmite)
Fossilized tree resin (Succinite variant)
Organic mineraloid
Amber
Succinite (specifically Baltic Amber) - Formula: C10H16O (approximate)
Organic Mineraloid
Blue Apatite
Calcium Fluorophosphate - Ca5(PO4)3F
mineral
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Quartz-veined Sandstone
Quartzite-veined Arenite / SiO2 and quartz sand
sedimentary
Gold Nugget
Native Gold (Au)
mineral
Quartz (Iron-stained)
Silicon Dioxide (SiO2) with hematite/limonite inclusions
mineral
Quartz with Mica inclusions (Gold-colored Mica)
Silicon Dioxide (SiO2) with Potassium Aluminum Silicate (Phlogopite/Muscovite) inclusions
Mineral
Mica-rich metamorphic rock, likely schist
Biotite–muscovite schist, possibly garnet-bearing
metamorphic
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Quartzite (Yellow/Iron-Stained)
Quartzite (SiO2 with Iron Oxide impurities)
metamorphic
Sandstone
Arenite
sedimentary
Tumbled milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Chrysocolla in Matrix
Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Silicate/Secondary Copper Mineral)
mineral
Limonite Geode (Ironstone Concretion)
FeO(OH)·nH2O (Hydrated Iron Oxide)
sedimentary
Granitic Pegmatite with Schorl
Granitic Pegmatite (NaAlSi3O8, KAlSi3O8, SiO2) with Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
igneous
Pyrite
Iron Sulfide (FeS2)
mineral
Orange Quartz (Ferruginous Quartz)
Silicon Dioxide (SiO2) with Iron Oxide inclusions
mineral
Red Feldspar (Orthoclase)
Orthoclase Feldspar (KAlSi3O8)
mineral
Chalcedony (Agate/Chert)
Microcrystalline Quartz (SiO2)
sedimentary
Blue-green fluorite (probable)
Fluorite, calcium fluoride (CaF₂)
mineral
Native Copper
Native Copper (Cu)
mineral
Banded Chert / Jasper
Silicon Dioxide (SiO2)
sedimentary
Fine-grained gray sandstone or quartz-rich sedimentary pebble
Likely quartz arenite or lithic sandstone; exact identification requires microscopy or testing
sedimentary
Weathered fine-grained stone, likely sandstone or quartzite
Quartz-rich sandstone (possibly weakly metamorphosed quartzite); predominantly SiO₂
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Staurolite (Fairy Stone)
Staurolite (Fe2+2Al9Si4O23(OH))
metamorphic
Pyrite
Iron Sulfide (FeS2)
mineral
Geode (Unopened)
Quartz Geode (SiO2) / Chalcedony Concretion
mineral
Slate
Foliated Metamorphic Slate
metamorphic
Jasper
Jasper (SiO2)
sedimentary
Prehnite
Ca2Al(AlSi3O10)(OH)2 (Calcium Aluminum Silicate hydroxide)
mineral
Red jasper in gray host rock (likely hematite-stained quartzite or rhyolite)
Jasper: microcrystalline quartz (SiO₂), with iron-oxide coloration; exact host uncertain from image
mineral
Amber
Succinite (formula varies, primarily C10H16O)
Mineraloid (Organic)
Weathered iron-rich rock, possibly laterite or limonite-bearing sandstone
Laterite/limonite-rich material; commonly dominated by goethite (FeO(OH)) and hydrated iron oxides
sedimentary
Calcite-rich limestone (possibly fossiliferous limestone)
Calcite, CaCO₃, in a limestone matrix
sedimentary
Milky quartz (likely weathered quartz fragment)
Quartz, silicon dioxide (SiO₂)
mineral
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with impure Iron inclusions
sedimentary
Chert (Nodule)
Microcrystalline Quartz (SiO2)
sedimentary
Moss Agate
Chalcedony (Silicon Dioxide, SiO2) with inclusions
mineral