Dendritic Opal
Hydrated Silica (SiO2·nH2O) with Manganese or Iron Oxide inclusions
mineral
Category
Mineral Like (Anthropogenic)
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Banded Gneiss (Variety of Gneiss)
Gneiss (specifically, a variety exhibiting prominent banding; mineral composition can vary, but often contains quartz, feldspar, mica, and amphibole)
Metamorphic Rock
Fluorite
Calcium Fluoride (CaF2)
mineral
Arsenopyrite in Quartz/Host Rock
Arsenopyrite (FeAsS)
mineral
Milky Quartz with Iron Oxide
Quartz (Silicon Dioxide, SiO2) with Limonite/Goethite staining
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Rutilated Quartz
Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions
mineral
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Sedimentary Rock (Limestone or Siltstone pebble)
Sedimentary rock fragment
sedimentary
Dendritic Agate (specifically Orange/Tumbled)
Silicon Dioxide (SiO2) with Oxide Inclusions
mineral
Muscovite Mica Schist
Muscovite Schist (KAl2(AlSi3O10)(OH)2)
metamorphic
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Kyanite in Quartz
Kyanite (Al2SiO5) with Quartz (SiO2)
metamorphic
Granodiorite Core
Granodiorite
igneous
Sandstone Cobble
Arenite (Sandstone)
sedimentary
Sandstone (likely Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Granite
Granite
igneous
Granite
Felsic intrusive igneous rock
igneous
Granite
Intrusive igneous rock composed mainly of quartz, alkali feldspar, and plagioclase
igneous
Granite
Felsic intrusive igneous rock
igneous
Granite
Felsic intrusive igneous rock
igneous
Diorite
Diorite (intermediate intrusive igneous rock)
igneous
Diorite
Diorite (intermediate intrusive igneous rock)
igneous
Diorite (Salt and Pepper Rock)
Diorite
igneous
Banded Gneiss
Gneiss
metamorphic
Diamond in Kimberlite
Kimberlite host rock with C (Carbon) inclusion
igneous
Granite
Phaneritic plutonic rock (primarily Quartz, Feldspar, and Mica)
igneous
Banded Gneiss (with Quartz Vein)
Gneiss (Metamorphic rock of varying mineralogy)
metamorphic
Feldspathic Gneiss
High-grade Metamorphic Rock (Gneiss)
metamorphic
Quartz (likely Milky Quartz or Chalcedony)
Quartz (SiO2 - Silicon Dioxide)
Mineral
Specular Hematite
Hematite (Fe2O3)
mineral
Yellow Quartz River Pebble
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Sandstone (Iron-stained)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)
sedimentary
Epidotite (Unakite-related Epidote)
Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))
metamorphic
Moonstone
Orthoclase (KAlSi3O8)
mineral
Raw Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Aura Quartz (Titanium/Rainbow Quartz)
SiO2 (Silicon Dioxide) with metallic coating
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone (lithic/greywacke variety)
Arenite (composed primarily of SiO2 with various lithic fragments)
sedimentary
Sandstone (Micaceous)
Arenite (primarily SiO2 with Phyllosilicates)
sedimentary
Schist
Mica Schist
metamorphic
Amygdaloidal Basalt with Quartz/Calcite Inclusions
Amygdaloidal Basalt (SiO2 / CaCO3 inclusions)
igneous