Man Made Object (Ring)

Green Quartzite

Quartzite (SiO2)

Dyed Agate

Silicon Dioxide (SiO2) with artificial pigment

Jasper

Silicon dioxide (SiO2) with impurities

Banded Iron Formation (BIF) / Iron Ore

Banded Iron Formation (composed primarily of Hematite (Fe2O3) and Magnetite (Fe3O4) with Quartz/Chert)

Granite

Phaneritic Felsic Igneous Rock

Sandstone Chert/Quartzite

Silicon Dioxide (SiO2) - Sedimentary Sandstone / Orthoquartzite

Rough Amethyst Quartz

Silicon Dioxide with Iron impurities (SiO2)

Clear Quartz Crystal

Quartz (Silicon Dioxide, SiO2)

Phantom Quartz with Chlorite and Hematite inclusions

Silicon Dioxide (SiO2) with inclusions of Chlorite group minerals and Hematite (Fe2O3)

Satin Spar Selenite

Gypsum (CaSO4·2H2O)

Map Jasper (Grey Picasso Jasper)

Silicon Dioxide (SiO2) with impurities

Sandstone

Arenite (primarily SiO2)

Granite Cobble

Phaneritic Felsic Igneous Rock (Granite)

Sandstone

Arenite (composed primarily of SiO2)

Quartz (Raw Chunk)

Silicon Dioxide (SiO2)

Chert (Nodule)

Silicon Dioxide (SiO2)

Basalt

Mafic Igneous Rock (composed primarily of Plagioclase and Pyroxene)

Quartz Mineral

Silicon Dioxide (SiO2)

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(OH)2)

Scoria

Vesicular Basalt / Scoria

Chalcedony (Common Opal/Chert variety)

Silicon Dioxide (SiO2)

Red Jasper (Chert)

Silicon Dioxide (SiO2) with iron oxide inclusions

Chert (Cherty Limestone / Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Lava Rock (Scoria)

Scoria (Vesicular Basalt)

Sandstone (Ferruginous)

Sandstone (primarily SiO2 with Iron Oxide cement)

Quartz Geode Fragment

Silicon Dioxide (SiO2)

Granite

Granite (Felsic intrusive igneous rock)

Sandstone (with Iron Oxide staining)

Arenite (primarily SiO2 with Fe2O3 staining)

Milky Quartz with Inclusions

Silicon Dioxide (SiO2)

Peridot

Olivine (Magnesium Iron Silicate), (Mg, Fe)2SiO4

Granite

Granite (a common term for a felsic intrusive igneous rock)

Clear Quartz

Silicon Dioxide (SiO2)

Mixed Quartz and River Pebbles (Stone Collection)

Mixed assortment containing mainly Silicon Dioxide (SiO2)

Clear Quartz Crystal (Rock Crystal)

Quartz (Silicon Dioxide, SiO2)

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Red Jasper

Jasper (Silicon Dioxide, SiO2 with Iron oxide inclusions)

Quartzite

Quartzite (primarily SiO2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Pumice

Pumicite

Clear Quartz Cluster

Silicon Dioxide (SiO2)

Gneiss

Gneiss

Quartzite

Quartzite (primarily SiO2)