Metamorphic Rock (Composed Of Multiple Minerals)

Granite

Granite (Phaneritic Igneous Rock)

Quartz-rich pegmatite fragment

Pegmatite composed chiefly of quartz (SiO₂), with probable feldspar and mica inclusions

Red Sandstone

Sandstone (principally Quartz with Iron Oxide coating)

Brecciated Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals such as Antigorite, Lizardite, and Chrysotile)

Slate

Foliated Metamorphic Rock (primarily composed of quartz, illite, chlorite, and micas)

Slate

Slate, a fine-grained metamorphic rock composed mainly of mica-group minerals and quartz

Granite

Granite (composed of Quartz, Feldspar, and Mica)

Weathered, iron-stained quartz-rich rock (possibly quartzite)

Likely quartzite, composed mainly of quartz (SiO₂); identification is provisional from the image

Gravel and Pebbles

Unconsolidated rock fragments / detrital sediment

Dalmatian Stone

Dalmatian Jasper (not a true jasper, typically an igneous perthite)

Layered metamorphic rock, possibly banded gneiss

Gneiss (tentative; exact identification requires closer examination)

Rhodonite, Gray Moonstone, and White Feldspar Mix

Multiple: MnSiO3 (Rhodonite), (K,Na)AlSi3O8 (Feldspar/Moonstone)

Granite with Pyrite or Mica

Phaneritic intrusive igneous rock

Sandstone

Arenite (SiO2 based)

Brecciated Jasper

Silicon Dioxide (SiO2) with Hematite impurities

Mica-rich schist

Quartz–muscovite/biotite schist

Sandstone (Graywacke)

Clastic Sedimentary Rock (Lithic Sandstone)

Bauxite

AlOx(OH)3-2x (mixture of Gibbsite, Boehmite, and Diaspore)

Quartz cluster, possibly druzy quartz on matrix

Quartz (SiO₂), likely microcrystalline to coarse crystalline; associated matrix uncertain

Unidentified dark, flat specimen

Indeterminate; image resolution is insufficient for mineral identification

Serpentinite

Serpentinite (composed largely of serpentine minerals like antigorite, lizardite, or chrysotile)

Dark, iron-stained rock; exact identification uncertain

Possibly a fine-grained mafic igneous rock (basalt or diabase); image alone is insufficient for a reliable species-level identification

Banded quartz-rich metamorphic rock (likely quartzite or quartz-mica schist)

Quartzite/schist composed chiefly of SiO₂ quartz with mica, feldspar, and iron-oxide or copper-colored accessory minerals

Slate

Slate; fine-grained metamorphic rock composed mainly of clay minerals, mica, and quartz

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals like Antigorite, Lizardite, and Chrysotile)

Granite

Granite (Plutonic Igneous Rock)

Weathered quartz-rich rock, likely quartzite or quartz vein fragment

Quartzite, composed predominantly of SiO₂; possible iron-oxide staining

Serpentinite (often called Jade or Nephrite substitute)

Serpentinite (composed primarily of Antigorite, Lizardite, or Chrysotile)

Seashell (Calcium Carbonate)

Calcium Carbonate (CaCO3)

Bauxite

Bauxite (Al2O3·2H2O mixed with iron oxides)

Lapis Lazuli

Lapis Lazuli (a rock composed primarily of Lazurite)

Likely slate

Slate, a fine-grained metamorphic rock composed mainly of mica-group minerals, chlorite, and quartz

Gneiss

Gneiss (High-grade metamorphic rock composed primarily of Quartz, Feldspar, and various Micas)

Granite

Phaneritic Plutonic Rock (primarily Quartz, Feldspar, and Mica/Amphibole)

Granite

Phaneritic Felsic Igneous Rock

Polished Jasper / Gneiss (Metamorphic/Siliceous Egg)

Siliceous Gneiss / Banded Metamorphic Rock

Rainbow Moonstone

White Labradorite (formula: (Na,Ca)(Al,Si)4O8)

Quartzite

Quartzite

Red Sandstone

Arenite (Iron-rich)

Mixed rock and mineral specimen collection

Multiple species, likely quartz (SiO₂), calcite (CaCO₃), feldspar, chert, and assorted volcanic/sedimentary rocks