Sedimentary Rock (Possibly Conglomerate Or Breccia With A Quartz Vein)

Quartzite (Yellow/Orange variety)

Quartzite (primarily SiO2)

Chert (Agatized/Chalcedony variety)

Microcrystalline Quartz (SiO2)

Biotite Mica

K(Mg,Fe)3AlSi3O10(OH)2

White Jade / White Chalcedony

Nephrite Jade (Ca2(Mg,Fe)5Si8O22(OH)2) or Chalcedony (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Milky Quartz with Garnet/Hematite and Basalt

Silicon Dioxide (SiO2) with Almandine (Fe3Al2Si3O12) and Basalt

Pyrite (Fool's Gold)

Iron Pyrite (FeS2)

Sandstone

Sedimentary Rock (Quartz Sandstone)

Quartz (Milky or Clear Quartz fragment)

Silicon Dioxide (SiO2)

Rounded pink granite pebble

Granite, a coarse-grained felsic intrusive igneous rock composed primarily of quartz, feldspar, and minor mica or amphibole

Tumbled reddish sandstone pebble

Quartz-rich sandstone, likely ferruginous arkose or quartz arenite

Milky Quartz

Silicon Dioxide (SiO2)

Pickled Dragon Eggs (Fictional Interpretation: Purple Agate or Amethyst Geodes)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Quartz-encrusted Matrix

Silicon Dioxide (SiO2) with Ferruginous Sandstone

Garnet-bearing granite or pegmatitic granitic rock

Coarse-grained granitoid, likely granite or pegmatite, composed mainly of quartz and feldspar with almandine/spessartine garnet and dark biotite or amphibole

Quartz Pebble

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Tumbled quartz with iron-oxide staining

Quartz (SiO₂), locally stained by goethite/limonite

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Shale (with minor calcite veining)

Clastic sedimentary rock (primarily clay minerals and quartz)

Quartz (likely a clear or rock crystal variety)

Quartz (SiO2 - Silicon Dioxide)

River Pebble (Quartz/Chert)

Silicon Dioxide (SiO2)

Quartz Pebble with Jasper and Iron Inclusions

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO₂)

Basalt with Quartz Veining

Veined Basalt (composed primarily of plagioclase feldspar, pyroxene, and olivine with quartz/calcite infill)

Yellow Quartz Pebble

Silicon Dioxide (SiO2)

Sandstone

Sedimentary Rock (Quartz Arenite)

Concretion or Geode (unbroken)

Varied (depending on mineral composition and cementing agent). For quartz-lined geodes, the scientific name of the dominant mineral would be Quartz (SiO2). For calcite-lined geodes, Calcite (CaCO3). Concretions are often composed of cryptocrystalline quartz (chert), calcite, or iron oxides.

Red Jasper

Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions

Smoky Quartz with Chert

Silicon Dioxide (SiO2)

Quartz (Clear Quartz/Rock Crystal)

Silicon Dioxide (SiO2)

Quartz Geode

Silicon Dioxide (SiO2)

Quartz Crystal Point

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Chert Pebble with Quartz Veins

Microcrystalline Quartz (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Clear Quartz (Druzy)

Crystalline Silicon Dioxide (SiO2)

Jasper (likely Brecciated or Multi-colored)

Jasper (SiO2)

Polished jasper (likely brecciated or iron-rich jasper)

Microcrystalline quartz (SiO₂), colored by iron oxides/hydroxides and possibly sulfide minerals

Quartzite with Quartz Veining

Quartzite (primarily SiO2)

Quartzite with Quartz Veining

Quartzite (primarily SiO2)

Amethyst

Amethyst (Silicon Dioxide - SiO2 with iron impurities)