Mineral Or Sedimentary Rock (With Mineral Inclusions)

Banded Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Iron-Stained Quartzite

Recrystallized Meta-Quartzite (primarily SiO2)

Pink Opal

Hydrated Amorphous Silica (SiO2·nH2O)

Lapis Lazuli (polished cabochon/sphere)

Na8[Al6Si6O24]Sn with accessory minerals (Pyrite, Calcite)

Milky Quartz

Silicon Dioxide (SiO2)

Pink Opal

Amorphous Hydrous Silica (SiO2·nH2O)

Red Jasper

Jasper (Silicon Dioxide with Iron Oxide impurities), formula: SiO2

Gneiss with Orthoclase Feldspar

Gneissic Metamorphic Rock with K-Feldspar inclusions

Hag Stone

Perforated Sedimentary Rock (typically Flint, Chert, or Limestone)

Polished jasper pebble

Microcrystalline quartz (SiO₂), commonly iron-stained jasper/chert

Red Sandstone

Clastic Sedimentary Rock (typically contains Quartz and Iron Oxide)

Chert (with Epidote/Quartz veining)

Cryptocrystalline silica (SiO2) with Epidote/Quartz inclusions

Milky quartz vein rock

Quartz, silicon dioxide (SiO₂), likely massive vein quartz with iron-oxide staining

Red jasper (likely polished/tumbled)

Microcrystalline quartz, SiO₂, colored mainly by hematite/goethite

Green Aventurine

Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)

Milky Quartz with Mineral Inclusions

Silicon Dioxide (SiO2) with miscellaneous inclusions

Likely rough quartz-bearing mineral specimen

Quartz (silicon dioxide, SiO₂), possibly iron-stained quartz or quartz-rich rock

Dalmatian Stone

Dalmatian Jasper (a trade name for an igneous microcrystalline rock composed mostly of feldspar, quartz, and dravite)

Yellow Jasper

Silicon Dioxide (SiO2 with iron oxide inclusions)

Sandstone (Quartz-rich Pebble)

Arenite (primarily SiO2)

Gray chalcedony or quartz fragment

Microcrystalline quartz, SiO₂ (tentative)

Milky Quartz

Silicon Dioxide (SiO2)

Chert (Nodule / Geode fragment)

Microcrystalline Quartz (SiO2)

Gneiss (with Garnet)

Gneiss (Feldspar-Quartz-Biotite-Garnet Metamorphic Rock)

Tumbled milky quartz

Quartz (silicon dioxide, SiO₂)

Possible fossil-bearing pebble

Unidentified fine-grained sedimentary rock; the small orange feature may be a fossil or mineral inclusion

Biotite Mica

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

Red Jasper

SiO2 (Silicon Dioxide with Iron Oxide inclusions)

Granitic Gneiss

Gneiss (high-grade metamorphic rock primarily of quartz, feldspar, and mica)

Sandstone

Arenite (SiO2 based with various cements)

Epidote

Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))

Gneiss (Metamorphic Rock)

Gneiss (variable mineral formula primarily containing Quartz, Feldspar, and Mica)

Quartzite pebble with Mafic inclusions

Quartzite (SiO2)

Sandstone

Arenite (primarily SiO2 - Silicon Dioxide)

Milky quartz (quartz-rich rock)

Quartz, silicon dioxide (SiO₂)

Himalayan Pink Salt

Halite (NaCl) with iron oxide inclusions

Milky Quartz

Silicon Dioxide (SiO2)

Jasper

Chalcedony (SiO2)

Red Quartz (Carnelian/Red Jasper Agate)

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Quartz with Inclusions

Silicon Dioxide (SiO2)

Jasper with Quartz Veining

Silicon Dioxide (SiO2) - Opaque cryptocrystalline variety of Quartz