Sedimentary Or Igneous (Secondary Formation)

Calcite

Calcium Carbonate (CaCO3)

Milky Quartz

Silicon Dioxide (SiO2)

Magnetite (Lodestone)

Iron(II,III) oxide (Fe3O4)

Mica-rich schist (probable)

Mica schist, composed mainly of mica minerals with quartz and possibly feldspar

Banded Agate

Cryptocrystalline Quartz (SiO2)

Quartz Cluster (Likely Ferruginous)

Silicon Dioxide (SiO2)

Red Jasper

SiO2 (Silicon Dioxide) with Fe2O3 (Hematite)

Ironstone Matrix with Jasper / Chert

Ferruginous Chert / Limonitic Jasper (SiO2 with Fe-oxides)

Biotite-rich schist (likely mica schist)

Mica schist; predominantly quartz, biotite mica, and feldspar

Mica-rich schist

Muscovite–quartz schist (tentative; image alone cannot confirm mineral composition)

Iron-stained Quartz

Silicon Dioxide (SiO2) with Hematite/Limonite inclusions

Quartz Geode

Silicon dioxide (SiO2)

Weathered iron-rich rock, possibly limonite-bearing basalt or ironstone

Uncertain; likely Fe-oxide/hydroxide–stained mafic rock (hematite Fe₂O₃, goethite FeO(OH), and silicates)

Green Jasper

Microcrystalline Quartz (Chalcedony), SiO2

Healer's Gold (Pyrite and Magnetite in Schist)

Magnetite (Fe3O4) and Pyrite (FeS2) in Mica Schist

Mica-rich rock, likely mica schist

Mica schist, composed chiefly of muscovite and/or biotite with quartz and feldspar

Magnetite (Iron Ore)

Magnetite (Fe3O4)

Magnetite (potentially Hematite)

Magnetite (Fe₃O₄)

Botryoidal Chalcedony

Chalcedony (SiO2)

Agate (Water-Worn Pebble)

Silicon Dioxide (SiO2) - Chalcedony

Weathered quartz-rich metamorphic rock (probable gneiss or quartzite)

Biotite–quartz–feldspar gneiss, possibly micaceous quartzite

Quartz

Silicon dioxide (SiO2)

Pyrite

Iron Pyrite (FeS2)

Dalmation Jasper (or Dalmation Stone)

Dalmation Stone (composed of Perthite, Quartz, and Arfvedsonite)

Weathered copper-bearing rock, possibly chrysocolla-bearing quartz or host rock

Indeterminate from the photo; possible chrysocolla (hydrated copper silicate) with quartz or other host minerals

Pyrite

Iron Pyrite (FeS2)

Chert / Flint (with quartz or calcite inclusion)

Silicon dioxide (SiO2)

Rough garnet-bearing metamorphic rock

Likely garnet amphibolite or garnet-bearing schist; garnet-group silicate, commonly almandine (Fe₃Al₂Si₃O₁₂)

Quartz Geode

Crystalline Silicon Dioxide (SiO2) in Geode form

Botryoidal Chalcedony (Agate)

Cryptocrystalline Quartz (SiO2)

Bloodstone (Heliotrope)

Silicon Dioxide (SiO2) with inclusions of Chlorite or Actinolite

Garnet-bearing metamorphic rock, likely garnet gneiss or garnet amphibolite

Garnet-bearing gneiss; red crystals likely almandine garnet, Fe₃Al₂(SiO₄)₃

Quartz Vein in Schist

Quartz-rich Micaceous Schist (SiO2 + phyllosilicates)

Tumbled metallic-gray stone, likely hematite or magnetite

Hematite (Fe₂O₃) or magnetite (Fe₃O₄); exact identification requires testing

Tumbled green aventurine

Quartzite dominated by quartz (SiO₂), commonly containing fuchsite mica or chlorite

Biotite-rich schist (mica schist)

Mica schist, chiefly biotite (K(Mg,Fe)₃AlSi₃O₁₀(OH,F)₂), with possible quartz and feldspar

Quartz

Silicon Dioxide (SiO2)

Quartz (Iron-stained / Orange Quartz)

Silicon Dioxide (SiO2)

Chalcedony (Agate)

Silicon Dioxide (SiO2)

Fluorite Tower

Fluorite (Calcium Fluoride - CaF2)

Tumbled blue-green stone, likely chrysocolla-bearing material

Chrysocolla, hydrated copper phyllosilicate: approximately (Cu,Al)₂H₂Si₂O₅(OH)₄·nH₂O; identification is provisional from the photograph

Milky Quartz

Silicon Dioxide (SiO2)