Sedimentary (Secondary Mineral) Within Igneous

Jasper with Hematite Inclusions

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3)

Quartz Geode

Silicon Dioxide (SiO2) in a concretionary structure

Jet

Lignite (Anthracite-grade compact coal)

Dalmatian Stone (commonly called Dalmatian Jasper)

Peralkaline Rock (mixed Feldspar, Quartz, and Arfvedsonite)

Chert / Jasper

Microcrystalline Quartz (SiO2)

Ferruginous Quartz

Quartz (Silicon Dioxide) - SiO2 with Iron Oxide inclusions

Mica Schist

Mica Schist (predominantly Muscovite or Biotite sheet silicates)

Labradorite (a variety of Anorthosite or Plagioclase)

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

Fancy Jasper

Silicon Dioxide (SiO2) with mineral inclusions

Yellow Ochre / Limonite

Limonite (Hydrated Iron(III) Oxide-Hydroxide, FeO(OH)·nH2O)

Chert Nodule in Limestone

Chert (Microcrystalline Quartz, SiO2) and Limestone (Calcium Carbonate, CaCO3)

Quartz (Milky/Iron-stained)

Silicon Dioxide (SiO2)

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Sandstone (with Iron Staining)

Clastic Sedimentary Rock (primarily Quartz, SiO2)

Graphic Granite

Graphic Pegmatite

Bull Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Fluorite

Calcium Fluoride (CaF2)

Labradorite

Labradorite ((Ca, Na)(Al, Si)4O8)

Amazonite

Microcline (K(AlSi3O8))

Siderite Concretion (Nodule)

Iron Carbonate (FeCO3) Concretion

Jasper (likely Brecciated or Multi-colored)

Jasper (SiO2)

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Fe2O3 staining)

Limonite/Goethite Gossan

FeO(OH)·nH2O (Hydrated iron oxide)

Quartz (likely milky/rose quartz variety)

Quartz (SiO2 - Silicon Dioxide)

Chalcedony (Banded/Mottled Variety)

Chalcedony (a cryptocrystalline variety of Quartz, SiO2)

Ironstone (with possible Hematite/Limonite coating)

Ironstone (Fe-rich sedimentary rock)

Galena

Lead(II) sulfide (PbS)

Quartz (likely a form of massive or vein quartz)

Quartz (SiO₂)

Ironstone Concretion (Pot Stone)

Siderite or Limonite Concretion (FeCO3 or FeO(OH)·nH2O)

Sandstone Concretion

Moqui Marble / Iron-oxide Concretion (SiO2 with Hematite/Goethite)

Eudialyte in Matrix

Na15Ca6Fe3Zr3Si26O72(OH,Cl,H2O)3

Brachiopod Fossil in Limestone

Phylum Brachiopoda, Class Rhynchonellata

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Milky or Common Quartz)

Silicon Dioxide (SiO2)

Clear Quartz

Silicon dioxide (SiO2)

Chrysocolla in Matrix

Hydrated copper phyllosilicate mineral (Cu,Al)2H2Si2O5(OH)4·nH2O

Zoisite with Ruby (Anyolite)

Zoisite – Ca2Al3(SiO4)3(OH) with inclusions of Ruby (Al2O3:Cr)

Granite

Phaneritic plutonic rock (Quartz, Alkali Feldspar, and Plagioclase)

Banded Sandstone

Arenite with Liesegang banding (primarily SiO2 with FeO(OH) impurities)

Milky Quartz

Silicon Dioxide (SiO2)