Sedimentary (Secondary Mineral) Within Igneous

Blue Quartz (Dumortierite Quartz / Celestite)

Silicon Dioxide (SiO2) with inclusions

Sandstone (Ferruginous)

Arenite with Iron Oxide cement (SiO2 + Fe2O3)

Sandstone (specifically Picture Sandstone or Wonderstone)

Arenite (composed primarily of SiO2)

Granite

Granite (composed mainly of Quartz, Potassium Feldspar, Plagioclase, and Biotite/Mica)

Milky Quartz Geode / Chalcedony Nodule

Quartz (Silicon Dioxide - SiO2)

Herkimer Diamond (Quartz Crystal)

Silicon Dioxide (SiO2)

Limonite Concretion

Goethite/Limonite (FeO(OH)·nH2O)

Chert (Jasper)

Silicon dioxide (SiO2) with impurities

Druzy Quartz on Chert/Siltstone

Silicon Dioxide (SiO2) on Microcrystalline Silica/Siltstone matrix

Malachite

Copper carbonate hydroxide [Cu2CO3(OH)2]

Red Granite Pebble

Intrusive Felsic Igneous Rock (Granite)

Diamond

Diamond (Pure Carbon, C)

Sandstone Concretion (Omar or Nut Rock)

Sedimentary Concretion (specifically an 'Omarolluk' or Omar)

Basalt Pebble with Quartz Veining

Basalt (extrusive volcanic rock)

Chert

Microcrystalline Quartz (SiO2)

Siltstone with Concretion

Siltstone (composed of hydraulic silicates and quartz particles)

Sandstone (likely Arkose or Lithic)

Clastic sedimentary rock (primarily SiO2)

Limonite Concretion (Goonie or Rattlestone)

Limonite (FeO(OH)·nH2O)

Labradorite

Labradorite (Plagioclase Feldspar series; (Ca,Na)(Al,Si)4O8)

Granite

Granite (Felsic Plutonic Rock)

Milky Quartz

Silicon Dioxide (SiO2)

Snowflake Obsidian

Volcanic Glass (spherulitic obsidian)

Sandstone (Ferruginous)

Arenite (with Iron Oxide)

Botryoidal Hematite (Iron Stone Conglomerate)

Hematite (Fe2O3) in sedimentary matrix

Raw Emerald in Matrix

Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities

Iron-Stained Quartz

Silicon Dioxide (SiO2) with Iron Oxide impurities

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Quartz

Silicon dioxide (SiO2)

Greenschist

Chlorite schist

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Weathered vesicular basalt (probable)

Basalt; primarily plagioclase, clinopyroxene, and iron-rich olivine, with secondary weathering minerals

Sandstone (likely Quartzose Sandstone)

Arenite (SiO2 based)

Pegmatite (Quartz, Feldspar, and Tourmaline/Biotite)

Pegmatitic Igneous Rock

Geode

Quartz / Chalcedony nodule

Milky Quartz

Silicon Dioxide (SiO2)

Sandstone (Iron-stained)

Arenite with Limonite/Hematite staining

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Aquamarine

Beryl (Be3Al2Si6O18)

Snowflake Obsidian

Volcanic Glass (spherulitic Obsidian) - SiO2 (with Cristobalite inclusions)

Peacock Ore

Bornite (Cu5FeS4)

Quartz Crystal

Silicon Dioxide (SiO2)

Dalmatian Stone

Dalmatian Jasper (Aplite rock composition)