Organic (If Resin) Or Synthetic (If Glass); Simulating Sedimentary Or Metamorphic (For Natural Stones)

Browse organic (if resin) or synthetic (if glass); simulating sedimentary or metamorphic (for natural stones) specimens identified by the Rock Identifier community.

Epidote (with Quartz and Feldspar)

Epidote (unakalite/unite), Ca2(Al2Fe3+)(SiO4)(Si2O7)O(OH)

metamorphic

Schist (Diamond Drill Core)

Mica Schist

metamorphic

Apatite

Fluorapatite, Chlorapatite, and Hydroxylapatite (Ca5(PO4)3(F,Cl,OH))

mineral

Quartzite Pebbles (River Stones)

Quartzite (primarily Silicon Dioxide, SiO2)

metamorphic

Honey Calcite

Calcium Carbonate (CaCO3)

mineral

Common Opal with Host Rock

Opal (Hydrated silica, SiO2·nH2O)

mineral

Conglomerate

Conglomerate (Detrital sedimentary rock)

sedimentary

Shungite

Non-crystalline carbon (Fullerenes / Carbon-60)

metamorphic

Smoky Quartz

Smoky Quartz (Silicon Dioxide - SiO2)

mineral

Almandine Garnet in Matrix

Almandine, Fe3Al2(SiO4)3

metamorphic

Limestone

Calcium Carbonate (CaCO3)

Sedimentary

Pebble or Cobble (likely composed of sandstone or conglomerate)

Clastic Sedimentary Rock (specific name like sandstone, conglomerate, or breccia would require microscopic analysis of clast size and angularity)

Sedimentary Rock (possibly a conglomerate or coarse-grained sandstone)

Moonstone (Feldspar)

Orthoclase (KAlSi3O8) or Albite (NaAlSi3O8)

mineral

River Cobble (likely Sandstone or Siltstone type)

Sandstone or Siltstone (common rock types that form river cobbles)

Sedimentary Rock (specifically a clastic sedimentary rock formed into a cobble)

Chert (specifically Flint or Common Chert node)

Silicon Dioxide (SiO2)

sedimentary

Red Garnet

Almandine (Fe3Al2(SiO4)3) or Pyrope (Mg3Al2(SiO4)3)

mineral

Puddingstone

Conglomerate (specifically a type of jasper conglomerate or quartz conglomerate)

Sedimentary

Collection of Minerals and Ores

Various (e.g., Uraninite (U3O8), Carbon (C), Native Gold (Au), Hematite (Fe2O3), Galena (PbS), etc.)

mineral

Quartz

Quartz (SiO2, Silicon Dioxide)

Mineral

Epidote

Epidote (Ca2(Al,Fe)3(SiO4)3(OH))

mineral

Sandstone (Pebble/Cobble)

Sandstone (arenite is a more precise term for sandstone with less than 15% matrix; this specimen appears to be a lithic or quartz arenite)

Sedimentary

Almandine Garnet

Almandine [Fe3Al2(SiO4)3]

mineral

Ferruginous Quartz

SiO2 (Silicon Dioxide) with Iron Oxide inclusions (FeO(OH) / Fe2O3)

mineral

Amygdaloidal Basalt with Zeolite/Quartz Infill

Amygdaloidal Basalt (Host: (Mg,Fe)2SiO4 / CaAl2Si2O8; Infill: SiO2 or Na2Al2Si3O10·2H2O)

igneous

Orange Calcite

Calcium Carbonate (CaCO3)

mineral

Banded Iron Formation

Banded Iron Formation (BIF)

sedimentary

Milky Quartz

Silicon Dioxide (SiO2)

mineral

Aragonite Star Cluster

Aragonite (Calcium Carbonate, CaCO3)

mineral

Rose Quartz

Silicon Dioxide with trace elements (SiO2 + Ti, Fe, or Mn)

mineral

Rough Garnet (Almandine)

Almandine Garnet (Fe3Al2(SiO4)3)

mineral

Coal (most likely Bituminous or Anthracite)

Bituminous Coal (Grade of Coal), Anthracite (Grade of Coal)

Sedimentary Rock

Limonite Pseudomorph after Pyrite

Goethite/Limonite FeO(OH)·nH2O replacing Pyrite FeS2

mineral

Almandine Garnet in Matrix

Almandine (Fe3Al2(SiO4)3)

metamorphic

Garnet

Almandine formula: Fe3Al2(SiO4)3

mineral

Amethyst (Purple), Sulfur (Yellow), and Blue Apatite

SiO2 (Quartz), S (Native Sulfur), Ca5(PO4)3(F,Cl,OH) (Apatite Group)

mineral

Granite

Granite (a broadly defined plutonic igneous rock, often more specifically classified as quartz monzonite or granodiorite based on precise mineral percentages)

igneous