Carved labradorite fish
Labradorite, calcium-rich plagioclase feldspar (approximately (Ca,Na)(Al,Si)₄O₈)
mineral
Category
Sedimentary Or Igneous Associated Mineral
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Polished blue labradorite
Labradorite, calcium-rich plagioclase feldspar (approximately NaAlSi₃O₈–CaAl₂Si₂O₈)
mineral
Likely rose quartz
Quartz, silicon dioxide (SiO₂), probably iron- or titanium-colored rose quartz
mineral
Graphite
Graphite (C)
mineral
Blue Lace Agate
Silicon Dioxide (SiO2) - Variety of Chalcedony
mineral
Muscovite Mica (on Quartz Matrix)
Muscovite - KAl2(AlSi3O10)(OH)2
mineral
Iron-rich concretion or weathered ironstone
Limonite/goethite-rich ironstone; commonly hydrated iron oxides (FeO(OH)·nH₂O)
sedimentary
Likely raw mica-bearing metamorphic rock or mineral fragment
Tentatively biotite schist; visually similar dark mica-rich material
metamorphic
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) within Sedimentary or Igneous Matrix
igneous
Rose Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Yellow Jasper
Silicon Dioxide (Microcrystalline Quartz), SiO2
sedimentary
Rhodochrosite
Manganese Carbonate (MnCO3)
mineral
Rhodochrosite
Manganese Carbonate (MnCO3)
mineral
Yellow Jasper
Tectosilicates (SiO2) with Goethite/Iron oxide inclusions
sedimentary
Glauconite (Greensand)
Glauconite ((K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2)
sedimentary
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Granite
Phaneritic plutonic rock (Felsic)
igneous
Peach Moonstone
Orthoclase (Potassium Aluminum Silicate), KAlSi3O8
mineral
Banded Agate
Cryptocrystalline Quartz (SiO2)
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Granodiorite
Granodiorite
igneous
Jasper
Silicon Dioxide (Microcrystalline Quartz, SiO2)
sedimentary
Eudialyte in Matrix
Na15Ca6(Fe,Mn)3Zr3(Si,Nb)(Si25O73)(O,OH,H2O)3(Cl,OH)2
mineral
Obsidian
Volcanic Glass (SiO2)
igneous
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Granite
Felsic intrusive igneous rock
igneous
Diorite
Diorite (Intrusive igneous rock)
igneous
Kyanite in Quartz
Kyanite (Al2SiO5) with Quartz (SiO2)
metamorphic
Quartz-rich pegmatite (likely quartz–feldspar–mica specimen)
Granitic pegmatite; chiefly quartz (SiO₂), feldspar, and mica
igneous
Dendritic Agate
Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions
mineral
Sulfur on Aragonite
Sulfur (S) on Aragonite (CaCO3)
mineral
Diorite
Plutonic Igneous Rock (NaAlSi3O8, CaAl2Si2O8)
igneous
Yellow Chalcedony
Silicon Dioxide (SiO2) - Chalcedony
mineral
Muscovite Schist
Muscovite Schist (KAl2(AlSi3O10)(OH)2 matrix)
metamorphic
Basalt River Stone
Basalt (Aphanitic Mafic Igneous Rock)
igneous
Biotite-bearing gneiss or schist
Quartz–feldspar–mica metamorphic rock, likely mica schist/gneiss
metamorphic
Vesicular basalt (likely scoriaceous basalt)
Basalt; chiefly plagioclase, clinopyroxene, and Fe–Mg minerals, with possible olivine and iron oxides
igneous
Raw ruby (corundum)
Ruby variety of corundum, aluminum oxide (Al₂O₃), colored chiefly by chromium
gemstone
Black Obsidian
Obsidian (Volcanic Glass, SiO2 + impurity)
igneous
Green fluorite (likely)
Fluorite, calcium fluoride (CaF₂)
mineral
Gold Ore in Matrix
Native Gold (Au) in Quartz/Limonite host rock
mineral