Jasper (specifically Green Jasper/Chert)
Jasper (Silicon Dioxide, SiO2)
sedimentary
Category
Mineral Based Alloy (Anthropogenic)
Browse mineral based alloy (anthropogenic) specimens identified by the Rock Identifier community.
River Stone / Siltstone
Siltstone (composed of lithified silt)
sedimentary
Conglomerate
Conglomerate (Clastic Sedimentary Rock)
Sedimentary
Gastropod Steinkern (Fossil Snail Internal Mold)
Class Gastropoda (Internal Mold)
sedimentary
Conglomerate
Conglomerate (SiO2, Al2O3, Fe2O3, CaCo3)
sedimentary
Diorite
Diorite (Intermediate plutonic rock)
igneous
Native Gold Nuggets
Native Gold (Au)
mineral
Diamond (as set in a metal alloy ring)
Diamond (Pure Carbon, C)
mineral
Silver (Native Silver/Alloy Specimen)
Ag (Native Silver element), specifically a 90% Ag / 10% Cu alloy
mineral
Chert (Yellow Jasper variant)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (specifically Gray/Tan Bedded Chert)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Shale or Mudstone (Based on appearance)
Shale (fine-grained, laminated fissile sedimentary rock) / Mudstone (fine-grained, non-fissile sedimentary rock)
Sedimentary
Fossilized Coral (Petoskey Stone or similar)
Hexagonaria percarinata (Fossilized Rugose Coral)
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Conglomerate
Clastic Conglomerate (Lithic-rich)
sedimentary
Conglomerate
Clastic Sedimentary (Conglomerate)
sedimentary
Amber
Succinite (Carbon-based organic compound; approximate formula C10H16O)
Mineraloid
Picasso Stone
Metamorphosed Calcium Carbonate (Limestone)
sedimentary
Chert (Limestone-based)
Silicon Dioxide (SiO2) within Carbonate host
sedimentary
Porcelain (Kaolin-based)
Alumina silicate ceramic (composed primarily of Kaolinite: Al2Si2O5(OH)4)
metamorphic (man-made/engineered)
Chert (Limestone-based)
Silicon Dioxide (SiO2)
sedimentary
Ferruginous Slag (Iron Smelting Byproduct)
Anthropogenic Vitreous Silicate (often containing Fayalite: Fe2SiO4)
Mineraloid/Anthropogenic (Technofossil)
Diamond Plate (Steel)
Alloyed Carbon Steel or Aluminum with 'Durbar' pattern
not a rock (Man-made industrial metal)
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Laterite
Lateritic Soil/Rock (rich in Fe2O3 and Al2O3)
sedimentary
Chert (specifically Jasper/Flint pebble)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Puddingstone
Conglomerate (typically quartz-rich or jasper-rich)
sedimentary
Granitic Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Sandstone
Sandstone (composed primarily of sand-sized minerals or rock grains)
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Silty Sand / Loam
Unconsolidated Clastic Sediment (Silicon Dioxide / Alumino-silicates mixture)
sedimentary
Conglomerate
Conglomerate (Clastic Sedimentary Rock)
sedimentary
Crinoid Stem Fragment
Crinoid (Phylum Echinodermata, Class Crinoidea)
sedimentary
Calamites Fossil (Horsetail Stem)
Calamites (Genus), part of the class Equisetopsida
sedimentary
Emerald
Beryl (Be₃Al₂Si₆O₁₈), specifically the green variety colored by trace amounts of chromium or vanadium.
Mineral
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Granite (Alkali-feldspar Granite)
Granite (composed primarily of Quartz, K-Feldspar, and Plagioclase)
Igneous
Banded Iron Formation (BIF)
Magnetite-Hematite Chert (Banded Iron Formation)
sedimentary
Gold
Native Gold (Au)
mineral
Yellow Jasper
Silicon Dioxide (SiO2) with Goethite or Iron Oxide inclusions
sedimentary
Dendritic Jasper (Bumblebee like Agate)
Silicon Dioxide with inclusions (SiO2)
sedimentary
Iron-Nickel Meteorite
Siderite (Iron Meteorite), primarily Fe-Ni alloy
igneous