Man Made Material (Simulated Mineral)

Chalcedony (Common Opal or Agate variant)

Silicon Dioxide (SiO₂)

Dream Amethyst (Chevron Amethyst)

Silicon Dioxide with inclusions (SiO2)

Blue Quartz (Dumortierite Quartz)

Quartz (SiO2) with inclusions of Dumortierite (Al7(BO3)(SiO4)3O3)

Lapis Lazuli

Lapis Lazuli (Rock containing Lazurite, Na8[AlSi O4]6[S,Cl,SO4,OH]2)

Granite Cobble

Phaneritic Felsic Igneous Rock

Limonite (Iron Ore/Sandstone mixture)

Limonite (FeO(OH)·nH2O) often mixed with Goethite and sedimentary matrix

River Siltstone Pebble

Siltstone (primarily composed of silica and clay minerals)

Lapis Lazuli (Low Grade)

Lazurite-rich metamorphic rock ((Na,Ca)8(AlSiO4)6(SO4,S,Cl,OH)2)

Brachiopod Fossil in Limestone

Phylum Brachiopoda (likely Order Spiriferida), CaCO3 (Calcite)

Quartz (likely tumbled or naturally water-worn)

Quartz (SiO₂ - Silicon Dioxide)

Chert (concretionary/nodular variant)

Microcrystalline Quartz (SiO2) with possible fossil or mineral inclusions

Labradorite (a variety of Anorthosite or Plagioclase)

Labradorite (member of Plagioclase Feldspar series), (Ca,Na)(Al,Si)4O8

Petrified Wood

Silicified Wood (SiO2)

Jasper

Jasper (Silicon Dioxide, SiO2)

Red Sandstone

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

Granodiorite

Granodiorite (Na,Ca)(Al,Si)4O8

Graphite

Graphite (Native Carbon, C)

Siltstone/Sandstone (possibly Wonderstone or Picture Sandstone)

Clastic Sedimentary Rock (primarily SiO2 with Iron Oxide inclusions)

Sandstone

Arenite (Sedimentary rock composed of sand-sized grains, primarily SiO2)

Sandstone (Micaceous/Feldspathic variant)

Arenite (specifically subarkose or lithic arenite)

Sandstone (with Liesegang rings or Oxidation)

Arenite (primarily Quartz SiO2 with Iron Oxide Fe2O3 staining)

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Granodiorite

Granodiorite (Na,Ca)(Si,Al)4O8

Fulgurite

Fulgurite (Lechatelierite), amorphous SiO2

Vesicular Basalt (Iron-rich)

Scoriaceous Basalt / Oxidized Vesicular Basalt

Olivine (Peridot)

Magnesium Iron Silicate (Mg,Fe)2SiO4

Ferruginous Sandstone

Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)

Bauxite / Iron-rich Laterite

Laterite (principally Al(OH)3, Fe2O3, and SiO2)

Quartzite

Quartzite (primarily SiO2)

Olivine (Peridot)

Magnesium Iron Silicate ((Mg, Fe)2SiO4)

Pyrite

Iron Sulfide (FeS2)

Ironstone with Limonite/Goethite coating

Ferruginous Sedimentary Rock (contains Limonite FeO(OH)·nH2O)

River Jasper (Chert/Chalcedony mix)

Silicon Dioxide (SiO2) with iron oxide and chlorite inclusions

Petrified Wood

Silicified Wood (SiO2)

Gneiss

Gneiss (Metamorphic high-grade)

Banded Gneiss (with Quartz Vein)

Gneiss (Metamorphic rock of varying mineralogy)

Sandstone (Ferruginous)

Arenite with Iron Oxide (Fe2O3) cement

Quartzite

Quartzite (Primary mineral: SiO2)

Granite (Pink/Red variety)

Phaneritic Felsic Intrusive Igneous Rock (composed primarily of Quartz, K-Feldspar, and Plagioclase)

Red Granite

Phaneritic Plutonic Rock (High Potassium Feldspar)

Diamond

Carbon (C), specifically a solid form of the element carbon with atoms arranged in a crystal structure called diamond cubic.

Pink Granite

Phaneritic plutonic rock (dominated by Alkali Feldspar)