Mineral, Possibly Rock Fragment Containing A Mineral

Anthracite Coal

Anthracite (Carbon-based sedimentary-derived metamorphic rock)

Man-made material (constructed)

Sunstone

Plagioclase Feldspar (specifically Oligoclase variety containing hematite or goethite inclusions)", composition: (Ca,Na)(Al,Si)2Si2O8

Mineral

Brick

Fired clay or Ceramic material (no specific mineralogical scientific name as it's a composite)

Goldstone (with Tiger's Eye and Quartz)

Aventurine glass (Synthetic SiO2 with Cu inclusions)

Chert (containing Quartz)

Microcrystalline Silica (SiO2)

Quartz (Rose or Milky variety fragment)

Silicon Dioxide (SiO2)

Sunstone

Oligoclase (Plagioclase Feldspar) with inclusions - (Ca, Na)((Al, Si)4O8)

Serpentinite (Serpentine Rock)

Serpentinite is a rock composed of one or more serpentine group minerals, chiefly antigorite, chrysotile, and lizardite, with the general formula (Mg,Fe)3Si2O5(OH)4. Often includes other minerals like magnetite, talc, and chromite.

Metamorphic Rock

Chinese Writing Stone

Porphyritic Basalt or Porphyritic Andesite with Feldspar phenocrysts (SiO2-rich Silicates)

Ferruginous Conglomerate (or Iron-Rich Concrete/Slag)

Clastic Sedimentary (Silicon Dioxide/Iron Oxide matrix)

Ironstone with Limonite/Goethite coating

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

Note: Image shows a biological specimen (Rat), not a rock. Representative geological equivalent: Galena (due to lead-grey colors in fur).

Galena (PbS)

Granite

Phaneritic plutonic rock (composed mainly of SiO2, Al2O3, K2O, and Na2O)

Scoria (Vesicular Basalt)

Scoria (Extrusive Igneous Rock)

Coquina Jasper

Fossiliferous Chalcedony (SiO2)

Granodiorite with Biotite Mica

Granodiorite (containing Quartz, Plagioclase Feldspar, and Biotite Mica)

Coquina

Coquina (Bioclastic Limestone)

Granodiorite

Granodiorite (phaneritic intrusive igneous rock)

Pegmatite

Granitic Pegmatite

Ferruginous Sandstone (Gozzanous)

SiO2 (Quartz) with FeO(OH) (Goethite) or Fe2O3 (Hematite) coating

Milky Quartz / Rose Quartz fragment

Silicon Dioxide (SiO2)

Blue Aventurine

Silicon Dioxide (SiO2) containing Dumortierite or Crocidolite inclusions

Basalt

Basalt (Aphanitic Mafic Igneous Rock)

Basalt

Extrusive mafic igneous rock

Limestone

Calcium Carbonate (CaCO3)

Calcite

Calcite (CaCO₃, Calcium Carbonate)

Mineral

Mica Schist

Mica Schist (Quartz-Biotit-Muscovite Schist)

Serpentine (Serpentinite)

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

Quartz Pebble (with probable Iron staining)

Silicon Dioxide (SiO2)

Amethyst

Silicon dioxide (SiO2) containing traces of iron and manganese

Oolitic Chert

Oolitic Microcrystalline Quartz (SiO2)

Limestone

Calcium carbonate ( преимущественно CaCO3)

Basalt

Basalt (containing Pyroxene, Plagioclase Feldspar, and Olivine)

Breccia

Clastic Breccia (SiO2/CaCO3 dominated)

Red Jasper (possibly Red Coral or dyed Howlite)

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Serpentinite

Serpentinite (a rock composed predominantly of serpentine group minerals)

Basalt

Basalt (Mafic volcanic rock)

Amber

Succinite (Resin C10H16O)

Quartzite

Quartzite (SiO2)