Mineral Or Sedimentary Rock (With Mineral Inclusions)

Sandstone with Magnetite and Iron Staining

Clastic Sedimentary Rock (contains Fe3O4 and Limonite/Hematite)

Sandstone (Ferruginous)

Arenite (primarily SiO2 with iron oxide Fe2O3 cement)

Sandstone (likely Quartzose Sandstone)

Arenite (primarily SiO2)

Gneiss (foliated metamorphic rock)

Gneiss

Sandstone (Calcareous or Quartz-rich)

Arenite

Sandstone

Arenite (SiO2 composed primarily of quartz)

Red Sandstone

Ferruginous Sandstone (SiO2 with Fe2O3)

Quartz with Mica inclusions (likely Schist or Gneiss host)

Silicon Dioxide (SiO2) with Phyllosilicates (KAl2(AlSi3O10)(OH)2)

Sandstone (Ferruginous)

Arenite (SiO2 with Fe2O3 inclusions)

Conglomerate

Conglomerate (clastic sedimentary rock)

Sandstone (Quartzose)

Arenite (primarily SiO2)

Quartz Vein in Siltstone

Siltstone with Quartz (SiO2) inclusion

Jasper Pebble

SiO2 (Microcrystalline Quartz)

Sandstone

Arenite (SiO2 based typically)

Milky Quartz

Silicon Dioxide (SiO2)

Mineral and Rock Collection (Assorted)

Mixed collection including Quartz (SiO2), Jasper (SiO2 with impurities), Rose Quartz, and Aventurine

Jasper and Quartz Pebble

Silicon dioxide (SiO2) microcrystalline quartz

Sandstone

Arenite (SiO2 based)

Sandstone (Ferruginous)

Arenite (SiO2 with Fe2O3 inclusions)

Agate (Carnelian / Chalcedony)

Silicon Dioxide (SiO2)

Amygdaloidal Basalt

Amygdaloidal Basalt (containing quartz/agate or zeolite fill)

Dalmation Stone

Peralkaline Rock (mixed silicate minerals)

Sandstone

Clastic Sedimentary Rock (composed mostly of SiO2)

Sandstone (likely Red/Brown Sandstone)

Arenite (SiO2 based)

Rounded quartz-rich pebble

Lithic pebble; likely quartz/quartzite with iron-oxide staining

Gneiss (with Mica and Quartz)

Gneissic Metamorphic Rock

Sandstone (Quartzose)

Arenite (composed primarily of SiO2)

Agate (Common Chalcedony)

Silicon Dioxide (SiO2)

Sandstone (Red/Brown Variety)

Arenite (SiO2 with iron oxide impurities)

Sandstone (Ferruginous)

Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)

Sandstone (with potential trace fossils)

Clastic sedimentary rock (primarily SiO2)

Chert (and Fossiliferous Chert)

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (SiO2)

River Rock (Basalt or Sandstone)

Clastic Sedimentary Rock or Extrusive Mafic Igneous Rock

Tumbled jasper pebble

Jasper, an opaque microcrystalline variety of quartz (SiO₂), commonly containing iron oxides and other silicates

Hag Stone

Perforated Sedimentary Rock

Beach Pebble / Agate-bearing Chert Pebble

Microcrystalline Quartz (SiO2) with Inclusion Minerals

Green Chert (Jasper / Flint)

Silicon Dioxide (SiO2)

Conglomerate

Conglomerate (Sedimentary Rock)

Xenolith in Basalt

Mafic Igneous Rock with Felsic Inclusion

Pebble with Basaltic and Quartz-rich Banding

Polymictic Lithic Pebble

Sandstone

Arenite (SiO2 primarily)