Metamorphic Rock (Composed Of Multiple Minerals)

River Siltstone / Mudstone Pebble

Siltstone (composed of mixed silicate and carbonate minerals)

Red Sandstone

Arenite (primarily Quartz with Hematite cement)

Schist

Schist (metamorphic rock)

Laterite

Laterite (no specific mineral formula as it's a rock type)

Gneiss

Gneiss

Granitic Gneiss

Gneiss (Metamorphic rock of granitic composition)

Granite

Granite (composed primarily of Quartz, Feldspar, and Mica)

Greenstone

Greenschist (composed of actinolite, chlorite, and epidote)

Serpentinite

Serpentinite (composed primarily of serpentine-group minerals like antigorite, chrysotile, and lizardite; chemical formula varies but generally Mg3Si2O5(OH)4)

Gneiss (Granitic Gneiss)

Gneiss (composed primarily of Quartz, Feldspar, and Mica/Amphibole)

Granite Gneiss

Gneiss (High-grade Metamorphic Rock)

Greenschist

Greenschist (composed primarily of Chlorite, Actinolite, and Epidote)

Talc

Talc (Mg₃Si₄O₁₀(OH)₂)

Serpentinite

Serpentinite (composed primarily of serpentine group minerals like lizardite, chrysotile, or antigorite; Mg3Si2O5(OH)4)

Quartz

Quartz (SiO₂)

Basalt

Mafic Igneous Rock (composed primarily of plagioclase, pyroxene, and olivine)

Conglomerate

Conglomerate (a clastic sedimentary rock)

Gneiss

Gneiss (high-grade metamorphic rock)

Ferruginous Sandstone

Arenite with Iron-oxide cement (composed of Quartz and Limonite/Hematite)

Quartzite

Quartzite (composed primarily of Silica, SiO2)

Shale

Shale (Sedimentary rock composed of mud/clay minerals)

Gneiss

High-grade metamorphic rock (Gneiss)

Mookaite Jasper

Silicon Dioxide (SiO2) - Radiolarite

Gneiss

Gneissic Metamorphic Rock

Gneiss (Metamorphic Rock)

Gneiss (variable mineral formula primarily containing Quartz, Feldspar, and Mica)

Quartzite Pebble

Quartzite (composed primarily of Silica, SiO2)

Foliated Metamorphic Rock (likely Gneiss or Schist)

Gneissic Metamorphic Rock

Red Sandstone

Arenite (with Iron Oxide)

Quartzite (River Pebble)

Meta-quartzite (composed primarily of SiO2)

Marble

Marbles are primarily composed of calcite (calcium carbonate, CaCO3) or dolomite (calcium magnesium carbonate, CaMg(CO3)2).

Basalt

Mafic Igneous Rock (composed primarily of Pyroxene and Plagioclase Feldspar)

Basalt with Iron Oxidation

Extrusive Mafic Igneous Rock (composed of Plagioclase and Pyroxene)

Nuummite

Nuummite (Orthoamphibole rock composed of Anthophyllite and Gedrite)

Quartz Vein in Pelite (Metamorphic Rock)

Hydrothermal Quartz Veining in Metasedimentary Rock (SiO2)

Peridot

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

Quartzite (Beach Pebble)

Quartzite (composed primarily of SiO2)

Sandstone

Arenite (SiO2 primarily)

Dalmatian Jasper

Dalmatian Stone (a microcrystalline quartz and feldspar rock with arfvedsonite)

Slate

Foliated Metamorphic Rock (composed primarily of Quartz, Muscovite, and Illite)

Ferruginous Sandstone (Ironstone)

Clastic Sedimentary Rock (composed of SiO2 with Fe2O3/FeO(OH) cement)

Quartzite

Quartzite (composed primarily of SiO2)

Sandstone (likely Quartzose Sandstone pebble)

Arenite (primarily SiO2)