Quartz on Matrix
Silicon Dioxide (SiO2)
mineral
Category
Sedimentary Or Igneous
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Felsic Drill Core (likely Gneiss or Granite)
Felsic Metamorphic Rock (Gneissic profile)
metamorphic
Gneiss
Gneiss
metamorphic
Quartz chunk
Silicon dioxide (SiO2)
mineral
Quartz (Milky or Smoky Quartz)
Silicon Dioxide (SiO2)
mineral
Dendritic Agate
Silicon Dioxide (SiO2) with manganese/iron inclusions
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Quartz (Milky/Bull Quartz)
Silicon Dioxide (SiO2)
mineral
Gneiss
Foliated Metamorphic Rock
metamorphic
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Rainbow Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Yellow Jade (Yellow Chalcedony/Quartz)
Silicon Dioxide (SiO2)
mineral
Banded Agate (Agatized Geode Slice)
Silicon Dioxide (SiO₂)
mineral
Unidentifiable Specimen
Undetermined
Unknown
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Gneiss (Banded Gneiss)
Gneiss
metamorphic
Quartz (Milky/Clear)
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Gneiss
Metamorphic Gneiss (High-grade regional metamorphism)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz Cluster
Quartz (Silicon Dioxide - SiO2)
mineral
Carnelian
Carnelian (SiO2 with iron oxide impurities)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Turquoise
Turquoise - CuAl6(PO4)4(OH)8·4H2O
mineral
Red Hematite
Iron(III) Oxide (Fe2O3)
mineral
Gneiss
Gneiss (Metamorphic rock composed primarily of Quartz, Feldspar, and Mica/Amphibole)
metamorphic
Carnelian (Chalcedony)
Silicon Dioxide (SiO2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Chalcedony (Botryoidal)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
mineral
Fluorite
Calcium fluoride (CaF2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Pyritic Gneiss
Metamorphic Gneiss with Pyrite inclusions
metamorphic
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Granitic Gneiss
Gneiss (Metamorphic rock of granitic composition)
metamorphic
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Gneiss (with Quartz and Biotite Mica)
Gneiss
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz / Rock Crystal
Silicon Dioxide (SiO2)
mineral
Clear Quartz Cluster
Silicon Dioxide (SiO2)
mineral