Igneous, Metamorphic, And Sedimentary (Mixed Assemblage)

Quartz (Granular)

Silicon Dioxide (SiO2)

Tumbled beige stone, possibly quartz or calcite

Indeterminate from photograph; likely microcrystalline quartz (SiO₂) or calcite (CaCO₃)

Fuchsite

Chromium-rich Muscovite Mica

Asphalt

Asphalt concrete

Mineral and Rock Collection (Assorted)

Mixed collection including Quartz (SiO2), Jasper (SiO2 with impurities), Rose Quartz, and Aventurine

Blue Apatite

Fluorapatite (Ca5(PO4)3(F,Cl,OH))

Blue Apatite

Ca5(PO4)3(F,Cl,OH)

Schist

N/A (a rock type, not a mineral formula)

Granite

Granite (Plutonic Igneous Rock)

Pink Granite

Phaneritic Felsic Igneous Rock

Lapis lazuli bead bracelet

Lazurite-bearing calcite–pyrite rock; lazurite formula (Na,Ca)₈(AlSiO₄)₆(S,SO)₂

Fulgarite

Fulgurite (Lechatelierite / Vitrified Sand)

Black Tourmaline

Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)

Granite-like rock fragment

Likely granitic aggregate; quartz–feldspar–mica assemblage

Dalmatian Stone (Dalmatian Jasper)

Peralkaline Quartz-Feldspar Porphyry with Arfvedsonite

Blue Apatite

Apatite (Group), Ca5(PO4)3(F,Cl,OH)

Copper Ore (Malachite and Limonite bearing)

Cuprite, Malachite, and Limonite mixture

Rhodonite

Rhodonite, manganese inosilicate — MnSiO₃; the specimen may include quartz, feldspar, and black manganese-oxide minerals in the matrix

Mixed Mineral Collection (Quartz, Amethyst, Rose Quartz, Pyrite, etc.)

Mixed Silicates and Sulfides (SiO2, FeS2)

Granite

Felsic intrusive igneous rock

Quartz and Mixed Sedimentary Rocks

Silicon Dioxide (SiO2) mixed with various clastic sedimentary lithologies

Quartz (Iron-stained Quartz)

Silicon Dioxide (SiO2)

Quartz with Matrix

Silicon Dioxide (SiO2)

Quartz (Small Fragment)

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Conglomerate (pebble-to-cobble gravel)

Polymictic conglomerate; clast-supported conglomerate in a sandy or silty matrix

Green Spot Jasper (Kiwi Jasper / Sesame Jasper)

Partially altered granitic rock rich in quartz, microcline feldspar, and tourmaline or amphibole inclusions

Blue Apatite

Ca5(PO4)3(F,Cl,OH)

Garnet (likely Almandine, Pyrope, or a blend)

Garnet group minerals: X3Y2(SiO4)3, where X and Y represent various metal ions (e.g., Almandine: Fe3Al2(SiO4)3, Pyrope: Mg3Al2(SiO4)3)

Quartz in Greenstone

Metamorphic rock with quartz vein (SiO2 / mixed silicates)

Pink Granite

Phaneritic Plutonic Felsic Igneous Rock (Granite)

Pegmatitic granite with dark mafic band

Granitic pegmatite; quartz–feldspar–mica assemblage, with biotite/amphibole-rich mafic material

Jasper / Agate

Silicon dioxide (SiO2)

Unakite

Epidotized Granite

Rounded river gravel (mixed alluvial pebbles)

Polymictic alluvial gravel; commonly composed of quartzite, granite, basalt, sandstone, and quartz

Quartz Vein in Greenstone

Metamorphic rock with quartz vein (SiO2 / mixed silicates)

Pink granite

Granite; quartz–alkali feldspar–plagioclase–biotite assemblage

Unidentified polished stone fragments

Indeterminate; likely mixed lapidary specimens, possibly jasper, agate, or quartz-bearing rock

Black Tourmaline (Schorl)

Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)

Orange Quartz / Peach Aventurine

Silicon Dioxide (SiO2)

Sandstone (lithic wake/graywacke variety)

Arenite/Greywacke (SiO2 with lithic fragments)

Jasper (Green Jasper/Heliotropic Chert)

Silicon Dioxide (SiO₂)