Clear Quartz
Silicon Dioxide (SiO2)
mineral
Category
Igneous Or Sedimentary (Anthropogenic Modification)
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Clear Quartz Crystal
Quartz (Silicon Dioxide - SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Quartz Sand
Silicon Dioxide (SiO2)
sedimentary
Quartz Sand
Silicon Dioxide (SiO2)
sedimentary
Rounded reddish-brown pebble
Likely ferruginous sandstone or iron-rich quartzite; exact identification requires a fresh surface and tests
sedimentary
Pyrite in Matrix
Iron Sulfide (FeS2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz-rich rock, possibly milky quartz or quartzite fragment
Quartz (SiO₂), potentially quartzite if metamorphic
mineral
Quartz (Pink/Rose or Hematinoid Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz pebble with a conchoidal chip
Silicon dioxide (SiO2)
mineral
Tumbled Quartz
Silicon Dioxide (SiO2)
mineral
Schist
Metamorphic Rock (Schist)
metamorphic
Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
White Agate / Chalcedony
Silicon Dioxide (SiO2)
gemstone
Quartz (Peach/Orange)
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Mica / Muscovite or Biotite
Phyllosilicate mineral group (e.g., KAl2(AlSi3O10)(OH)2)
mineral
Tumbled Hematite
Hematite (Fe2O3)
mineral
Blue Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Red Jasper
Silicon Dioxide with Iron Oxide inclusions (SiO2)
sedimentary
Gneiss
Metamorphic Gneiss
metamorphic
Quartz Geode / Druzy Quartz Node
Silicon Dioxide (SiO2)
sedimentary
Fluorite
Calcium Fluoride (CaF2)
mineral
Banded Gneiss
Gneiss (SiO2 enriched metamorphic rock)
metamorphic
Gneiss
Foliated Metamorphic Rock
metamorphic
Gneiss (or Granite Gneiss)
Metamorphic rock rich in quartz, feldspar, and biotite/amphibole
metamorphic
Gneiss (with Garnet)
Gneiss (Feldspar-Quartz-Biotite-Garnet Metamorphic Rock)
metamorphic
Gneiss
Gneiss (Foliated Metamorphic Rock)
metamorphic