Mineral Like (Anthropogenic)

Septarian Nodule (Septarian Dragon Stone)

Septarian Concretion (CaCO3 + Al2Si2O5(OH)4)

Basalt

Basalt (Mafic Extrusive Igneous Rock)

Banded Gneiss (Variety of Gneiss)

Gneiss (specifically, a variety exhibiting prominent banding; mineral composition can vary, but often contains quartz, feldspar, mica, and amphibole)

Serpentinite

Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4

Sandstone

Arenite (composed primarily of SiO2)

Quartz (Pinkish-Orange Variety)

Crystalline Silicon Dioxide (SiO2)

Sandstone

Clastic sedimentary rock (primarily SiO2)

Black Sand (Magnetite Sand)

Magnetite-rich Placers (Fe3O4)

Nephrite Jade

Nephrite (a variety of the mineral actinolite within the amphibole group); Chemical Formula: Ca2(Mg,Fe)5Si8O22(OH)2

Howlite

Howlite (Calcium Borosilicate Hydroxide: Ca2B5SiO9(OH)5)

Yellow Quartz (Citrine Quartz)

Silicon Dioxide (SiO2)

Quartz Geode

Silicon Dioxide (SiO2) in a concretion

Dendritic Agate

Silicon Dioxide (SiO2) with inclusions of manganese or iron oxides

Chrysocolla

Hydrated copper silicate (Cu,Al)2H2Si2O5(OH)4·nH2O

Larimar

Pectolite (NaCa2Si3O8(OH))

Amazonite

Microcline (KAlSi3O8) with lead inclusions

Moss Agate

Silicon Dioxide with inclusions (SiO2)

Chert (Common Opal/Agate inclusion)

Microcrystalline Quartz (SiO2)

Iceland Spar (Optical Calcite)

Calcite (Calcium Carbonate, CaCO3)

Diamond (Faceted)

Carbon (C)

Diamond

Diamond (pure native carbon, C)

Snowflake Obsidian

Spherulitic Volcanic Glass (primarily SiO2 with Cristobalite inclusions)

Slag Glass (Cullet Glass)

Amorphous Silica (Industrial byproduct)

Schist

Mica Schist

Quartzite

Quartzite (High-purity SiO2)

Granite

Phaneritic plutonic rock (Quartz, Alkali Feldspar, and Plagioclase)

Ironstone Concretion

Siderite or Limonite Concretion (FeCO3 or FeO(OH)·nH2O)

Ironstone Concretion

Siderite or Hematite Concretion (FeCO3 or Fe2O3)

Shale with Iron Oxide Staining

Fissile Mudstone (primarily clay minerals and quartz)

Dalmatian Stone (Dalmatian Jasper)

Peralkaline Quartz-Feldspar Porphyry with Arfvedsonite

Sandstone (with Iron Siderite Concretion)

Arenite with Ironstone Concretion (FeCO3)

Shale with Iron Staining

Fissile Argillaceous Sedimentary Rock

Azurite

Azurite (Cu3(CO3)2(OH)2)

Beryllonite

Beryllonite (NaBePO4)

Red Sandstone

Clastic sedimentary rock (primarily SiO2 with Fe2O3 iron oxide staining)

Green Aventurine

Silicon Dioxide (Quartz) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)

Gneiss

High-grade metamorphic rock (Gneiss)

Gossan (Limonite/Goethite)

Hydrated iron oxides (primarily FeO(OH)·nH2O)

Greenstone (Amygdaloidal Basalt)

Amygdaloidal Basalt (frequently composed of Plagioclase Feldspar, Pyroxene, and Olivine with Chlorite inclusions)

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Fe2O3/FeO(OH) cementing agents)

Septarian Nodule

Siderite or Calcite Concretion

Red Jasper

Cryptocrystalline Quartz (SiO2 with Iron oxide inclusions)