Mineral (Impactite)

Marble

Recrystallized Calcite (CaCO3)

Chlorite-rich schist (probable greenschist)

Greenschist-facies metabasalt or chlorite–actinolite schist

Fossil bone, possibly a large mammal long-bone fragment

Fossilized cortical bone; taxon indeterminate from the photograph

Shark Tooth Fossil

Vertebrate fossilized tooth (various genera such as Carcharodon, Otodus, or Negaprion)

Granite

Phaneritic Plutonic Felsic Rock

Green-and-white rough mineral specimen, possibly amazonite

Unconfirmed; possible amazonite, a green variety of microcline feldspar (KAlSi₃O₈)

Pink-orange mineral fragment, likely feldspar (possibly potassium feldspar)

Likely orthoclase or microcline, KAlSi₃O₈; identification from the image is uncertain

Green serpentine (likely serpentinite)

Serpentine-group minerals, commonly antigorite, lizardite, and/or chrysotile; rock name: serpentinite

Orthoclase Feldspar

Orthoclase (KAlSi3O8)

Iron-rich rock fragment (possibly ironstone or limonite/goethite)

Likely ironstone composed largely of goethite/limonite; image alone cannot confirm

Granite

Granite

Gneiss

Gneiss (High-grade metamorphic rock)

Unidentified dark metallic sulfide specimen

Possibly pyrite-, chalcopyrite-, or galena-bearing ore; exact identification requires testing

Copper Ore Specimen

Cupriferous Rock / Malachite-bearing ore

Likely serpentine-rich rock (serpentinite)

Serpentinite, composed mainly of serpentine-group minerals (e.g., lizardite, antigorite, or chrysotile); exact identification is uncertain from the image alone

Fluorite and Mineral Collection

Calcium Fluoride (CaF2)

Quartz Mineral

Silicon Dioxide (SiO2)

Unidentified dark mineral/rock fragment

Indeterminate; appearance may fit a sulfide-bearing rock or iron-rich mineral

Tumbled quartz-rich pebble (likely quartzite or vein quartz)

Quartz (SiO₂), possibly quartzite with minor iron-oxide staining

Granite

Granite (composed of Quartz, Feldspar, and Mica)

Magnetite (Lodestone)

Iron(II,III) oxide (Fe3O4)

Carved serpentine pendant

Serpentine-group minerals, commonly antigorite/lizardite (Mg₃Si₂O₅(OH)₄), possibly mixed with chlorite or other inclusions

Potassium Feldspar (Orthoclase)

Orthoclase (KAlSi3O8)

Orthoclase Feldspar (Potassium Feldspar)

KAlSi3O8 (Potassium Aluminum Silicate)

Iron-oxide-stained rock with a pale mineral vein

Likely limonite/goethite-stained quartz-bearing rock; exact identification is uncertain from the image

Sandstone

SiO2 (predominantly quartz sand)

Rhodochrosite

Manganese Carbonate (MnCO3)

Ruby (Raw Corundum)

Al2O3 (Aluminum Oxide)

Quartz–feldspar pegmatite mineral specimen

Quartz (SiO₂) with potassium feldspar, albite, mica, and likely garnet or tourmaline

Likely weathered granite or granitic gneiss

Quartz–feldspar–mica rock; possibly gneissic granite

Magnetite

Fe3O4 (Iron(II,III) oxide)

Pyrite with Quartz

Iron Sulfide (FeS2) with Silicon Dioxide (SiO2)

Tumbled pink granite

Granite, composed mainly of quartz, potassium feldspar, plagioclase, and dark mica or amphibole

Quartz in Limonite-rich Matrix

Silicon Dioxide (SiO2) with Goethite/Limonite FeO(OH)·nH2O

Gneiss

Gneiss (Metamorphic Rock)

Schist

Schist (various mineralogical compositions including mica, chlorite, talc, etc.)

Banded Gneiss (Variety of Gneiss)

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

Bornite

Bornite (Cu5FeS4)

Blue sodalite (likely)

Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂

Pyrite

Iron Sulfide (FeS2)

Limonite

FeO(OH)·nH2O

Pyrite

Iron Sulfide (FeS2)