Mineral, Specifically A Variety Of Quartz

Blue Quartz

Quartz (SiO2) with inclusions

Agate (Polished Nodule)

Agate (Silicon Dioxide, SiO2)

Quartz (possibly milky quartz or quartz with inclusions)

SiO2 (Silicon Dioxide)

Granite

Phaneritic Felsic Igneous Rock (Granite)

Red Quartz (Carnelian/Red Jasper Agate)

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Sandstone (Quartzose Sandstone Pebble)

Arenite (primarily SiO2)

Quartz (Rose or Milky variety fragment)

Silicon Dioxide (SiO2)

Basalt

Basalt (composition of plagioclase feldspar and pyroxene)

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Satin Spar (often marketed as Selenite)

Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O

Granite

Granite (composed primarily of Quartz, Feldspar, and Mica)

Granite

Granite (Phaneritic intrusion / SiO2 + KAlSi3O8 + NaAlSi3O8)

Red Sandstone

Arenite (with Iron Oxide / Hematite cementation)

Moss Agate

Chalcedony (SiO2) with inclusions of hornblende or chlorite

Bicolor Tanzanite

Zoisite (Ca2Al3(SiO4)3(OH))

Labradorite (specifically Larvikite beads)

Plagioclase Feldspar (Na,Ca)(Si,Al)4O8

Crazy Lace Agate

Silicon Dioxide (SiO2) with iron and aluminum inclusions

Chert (Jasper/Agate variety)

Microcrystalline Quartz (SiO2)

Quartzite (River Cobble)

Quartzite (dominant mineral: Quatrz, SiO2)

Fossil Shark Tooth (Otodus obliquus)

Otodus obliquus; hydroxyapatite (mineralized form Ca5(PO4)3(OH))

Quartz (in matrix)

Quartz (SiO₂)

Yellow Jasper

Jasper (Silicon Dioxide, SiO2)

Chert (Jasper variety)

Silicon Dioxide (SiO2)

Chert Pebble

Microcrystalline Quartz (SiO2)

Chert (specifically Red Chert/Jasper nodule)

Microcrystalline Quartz (SiO2)

Cobaltian Calcite

Cobalt-bearing Calcite (Ca,Co)CO3

Chert (Yellow variety / Jasper)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Amethyst

Quartz variety; chemical formula: SiO₂ (silicon dioxide) with Fe³⁺ impurities

Carnelian

Chalcedony (cryptocrystalline quartz), SiO2

Agate (Bead Form)

Agate (Cryptocrystalline Quartz, SiO2)

Yellow Chalcedony or River Jasper

Silicon Dioxide (SiO2)

Tiger's Eye

Silicon dioxide (SiO2) with fibrous inclusions of crocidolite

Chert (with Quartz Vein)

Chert (Siliceous sedimentary rock, predominantly Microcrystalline Quartz SiO2)

Quartz (Iron-stained or Milky Quartz)

Silicon Dioxide (SiO2)

Red Jasper

Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions

Amethyst

SiO2 (Silicon Dioxide) - Purple variety of Crystalline Quartz

Fossilized Angel Wing Shell

Cyrtopleura costata

Red Sandstone

Arenite (primarily Quartz with Hematite cement)

Jasper

Jasper (Cryptocrystalline variety of Quartz, SiO2)

Green Jasper

Silicon Dioxide (SiO2) with impurities