Brecciated Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Category
Metamorphic Rock
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Granodiorite with Quartz Veining
Granodiorite (containing Plagioclase Feldspar, Quartz, and Biotite/Hornblende) with Quartz (SiO2) veins
igneous
Basalt
Basalt
igneous
Dalmation Jasper (or Dalmation Stone)
Dalmation Stone (composed of Perthite, Quartz, and Arfvedsonite)
igneous
Granodiorite
Phaneritic-textured Intrusive Granodiorite
igneous
River Pebble (Gravel)
Clastic sedimentary rock (likely Siltstone or Mudstone pebble; SiO2 with various impurities)
sedimentary
Diorite
Diorite (Intermediate intrusive igneous rock)
igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Druzy (Geode Fragment)
Silicon Dioxide (SiO2)
mineral
Chert (Agatized/Chalcedony variety)
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone with Quarzite clasts
Arenite (SiO2 based)
sedimentary
Chert (Jasper/Agate variety)
Microcrystalline Quartz (SiO2)
sedimentary
Ruby (varieties of Corundum)
Aluminum oxide (Al2O3) with Chromium traces
mineral
Greenschist
Greenschist (containing Chlorite, Epidote, and Actinolite)
metamorphic
Granite
Phaneritic Igneous Rock (Granite)
igneous
Banded Quartzite with Epidote and Iron Oxides
Metasedimentary Quartzite (SiO2) with inclusions
metamorphic
Botryoidal Chalcedony (Desert Rose / Agate)
Silicon Dioxide (SiO₂)
Mineral variant
Shale
Shale (clastic sedimentary rock)
sedimentary
Basalt
Afanitic Mafic Basalt
igneous
Basalt
Mafic volcanic rock (primarily plagioclase, pyroxene, and olivine)
Igneous
Staurolite (Fairy Cross)
Staurolite (Fe2+2Al9Si4O23(OH))
metamorphic
Quartz
Quartz (SiO2)
Mineral
Amazonite
Microcline (K(AlSi3O8))
mineral
Rhodochrosite
Rhodochrosite, Manganese Carbonate (MnCO3)
mineral
Biotite Schist
Biotite Schist (predominantly K(Mg,Fe)3AlSi3O10(OH,F)2)
metamorphic
Arsenopyrite in Quartz Matrix
Arsenopyrite (FeAsS) with Quartz (SiO2)
Mineral in a Metamorphic/Hydrothermal rock
Graphite
Graphite (C)
mineral
Sandstone with Quartz Vein
Arenite with Crystalline Silica (SiO2)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Quartz with inclusions
SiO2
mineral
Quartzite
Quartzite (primarily composed of SiO O₂)
Sedimentary Rock
Jasper in Rhyolite matrix
Silicon Dioxide (SiO2) with various inclusions in Felsic Igneous matrix
igneous
Greenstone / Greenschist
Chlorite schist / Epidiorite
metamorphic
Basalt with Plagioclase Phenocrysts
Porphyritic Basalt
igneous
Basalt with Iron Oxidation (Lattice/Veined)
Mafic Volcanic Rock (principally Plagioclase and Pyroxene)
igneous
Granite Pebble
Granite (Phaneritic intrusive igneous rock)
igneous
Basalt with Quartz/Calcite Veins
Aphanitic Mafic Igneous Rock (Hydrothermal Veined)
igneous
Conglomerate
Conglomerate (Detrital Sedimentary Rock)
sedimentary
Vesicular Basalt (Scoria)
Vesicular Basalt
igneous