Man Made Rock (Sedimentary Analogue)

Pyrite

Iron Sulfide (FeS2)

Likely weathered iron-rich rock or slag fragment

Uncertain; possibly limonite/goethite-rich material (FeO(OH)·nH₂O)

Banded calcite (likely polished limestone/marble fragment)

Calcite, CaCO₃; probable banded calcitic marble

Amethyst (Tumbled Cabinet Stone)

Silicon Dioxide (SiO2) with iron impurities

Desert Rose (also known as Sand Rose)

Gypsum (CaSO4·2H2O) or Barite (BaSO4) with sand inclusions

Turquoise cabochon ring

Turquoise — hydrated copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O

Granite

Granite (Phaneritic Quartz-Feldspar intrusive rock)

Chalcedony with iron-oxide staining

Microcrystalline quartz (SiO₂), likely chalcedony or chert with limonite/goethite staining

Tumbled epidote-bearing rock (likely epidote–quartz–feldspar aggregate)

Epidote-rich metamorphic rock; minerals likely epidote (Ca₂(Al,Fe)₃Si₃O₁₂(OH), quartz, feldspar, and dark amphibole/biotite)

White Marble

Recrystallized Calcite (CaCO3)

Chert Arrowhead (Jasper)

Chert (Cryptocrystalline Quartz, SiO2)

Pyrite

Iron Sulfide (FeS2)

Chert / Flint

Silicon Dioxide (SiO2)

Chalk

Micrite (primarily Calcium Carbonate or CaCO3)

Green glassy mineral specimen, likely rough emerald or green fluorite

Tentatively beryl (Be₃Al₂Si₆O₁₈), emerald variety; synthetic/man-made glass cannot be excluded from the photograph

Granite

Phaneritic Felsic Igneous Rock

Granite

Granite (Felsic Plutonic Rock)

Pink Granite (Alkali-feldspar Granite)

Felsic intrusive igneous rock (composition: KAlSi3O8, SiO2, NaAlSi3O8)

Weathered fossil shell fragment

Indeterminate bioclastic carbonate, likely molluscan shell (calcium carbonate, commonly aragonite or calcite)

Chalcedony / milky quartz flake

Microcrystalline quartz (SiO₂), likely chalcedony; possibly a worked quartzite or chert fragment

Shale

Shale (clastic sedimentary rock)

Shale (or Mudstone/Siltstone)

Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)

Chert (Flint)

Silicon Dioxide (SiO2)

Chert

Chert (SiO2)

Chert (Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert / Flint

Chert (varieties include Flint)

Chert

Microcrystalline silica (SiO2)

Red Sandstone

Arenite (Iron-rich)

Chert (Yellow Jasper variant)

Microcrystalline Quartz (SiO2)

Chert (Common Opal/Jasper variety)

Cryptocrystalline Quartz (SiO2)

Chert (Commonly known as Flint)

Silicon Dioxide (SiO2)

Jasper / Chert (Red)

Cryptocrystalline quartz (SiO2)

Fulgarite

Fulgurite (Lechatelierite / Vitrified Sand)

Quartzite

Quartzite (SiO2)

Granite

Phaneritic plutonic rock (SiO2 typically >69%)

Beaded gemstone bracelet, likely lapis lazuli and pale quartz/agate

Lapis lazuli: lazurite-rich rock, chiefly (Na,Ca)₈(AlSiO₄)₆(S,SO)₂; pale beads are uncertain

Chert (Flint nodule)

Chert (SiO2)

Chert

Microcrystalline Silicon Dioxide (SiO2)

Tumbled chalcedony or quartz pebble

Microcrystalline quartz, SiO₂ (likely chalcedony); exact identification is uncertain from the image

Faceted glass-like gemstone object

Likely synthetic glass or cubic zirconia; exact material cannot be confirmed from the image

Likely blue glass or synthetic gemstone jewelry

Uncertain; possibly synthetic spinel, cubic zirconia, or blue glass

Desert Rose (Baryte or Gypsum Rose)

Baryte (BaSO4) or Gypsum (CaSO4·2H2O)