Man Made Material (Constructed)

Granite Pebble

Granite (a plutonic igneous rock composed primarily of quartz, feldspar, and mica/amphibole)

Moonstone (bead form)

Potassium Aluminum Silicate (KAlSi3O8) - a variety of Orthoclase Feldspar

Quartzite

Quartzite (SiO2)

Soapstone

Steatite (primarily composed of Talc, Mg₃Si₄O₁₀(OH)₂)

Granite (weathered/river-tumbled)

Granite (Plutonic Igneous Rock)

Clear Quartz (or Rock Crystal)

Quartz (SiO₂)

Quartz with Iron Stains

Quartz (SiO2) with iron oxide/hydroxide staining

Granite

Granite (a felsic intrusive igneous rock)

Halite

Halite (NaCl)

Quartz (milky quartz variety)

Quartz (SiO₂)

Sodalite (blue beads) and Clear Quartz (clear beads)

Sodalite: Na4Al3Si3O12Cl; Quartz: SiO2

Granite

Granite (a felsic intrusive igneous rock)

Red Tiger's Eye beads

Tiger's Eye (variety of Chalcedony, SiO2)

Garnet (likely Pyrope or Almandine)

Garnet Group (complex nesosilicate minerals, e.g., Pyrope Mg3Al2(SiO4)3, Almandine Fe3Al2(SiO4)3, Spessartine Mn3Al2(SiO4)3, Grossular Ca3Al2(SiO4)3, Andradite Ca3Fe2(SiO4)3, Uvarovite Ca3Cr2(SiO4)3). The vivid red color in the image strongly suggests Pyrope or Almandine.

Shale or Slate with Quartz Veins

Shale (fine-grained clastic sedimentary rock) or Slate (low-grade metamorphic rock formed from shale) with Quartz (SiO2) veins

Chalcedony (Banded/Mottled Variety)

Chalcedony (a cryptocrystalline variety of Quartz, SiO2)

Zircon

Zircon (ZrSiO4)

Quartz (likely Jasper or Chert variety)

Quartz (SiO₂)

Carnelian

Carnelian (a variety of Chalcedony, SiO2)

Aventurine

Aventurine Quartz (SiO2 with inclusions)

Quartzite

Quartzite (primarily SiO2)

Basalt

Basalt (dominated by plagioclase feldspar and pyroxene)

Granite

Granite (a plutonic igneous rock)

Banded Jasper (Chert)

Silicon Dioxide (SiO2) - variety of Chalcedony

Rutilated Quartz

SiO2 (Quartz) with TiO2 (Rutile inclusions)

Serpentinite (Serpentine Rock)

Serpentinite is a rock composed of one or more serpentine group minerals, chiefly antigorite, chrysotile, and lizardite, with the general formula (Mg,Fe)3Si2O5(OH)4. Often includes other minerals like magnetite, talc, and chromite.

Chert (Flint)

Chert (predominantly SiO₂ - silicon dioxide)

Quartz (River Pebble)

Quartz (SiO₂ - Silicon Dioxide)

Pebble (likely Quartzite or Chert)

Clastic Sediment, potentially composed of SiO₂ (Quartz)

Quartz

Quartz (Silicon Dioxide - SiO2)

Muscovite Mica

Muscovite (KAl₂(AlSi₃O₁₀)(F,OH)₂))

Quartz (possibly milky quartz)

Quartz (Silica; SiO₂)

Calcite

Calcite (CaCO3)

Gneiss

Gneiss (a rock type, not a specific mineral with a formula)

Quartzite

Quartzite

Dolomite

Dolomite (CaMg(CO3)2)

Calcite

Calcite (Calcium Carbonate, CaCO3)

Red Jasper (beads)

Silicon Dioxide (SiO2) with iron inclusions

Sunstone and Green Aventurine

Sunstone: (Ca,Na)[(Al,Si)2Si2O8] (Plagioclase Feldspar Group); Green Aventurine: SiO2 (Quartz)

Granite

Granite (a plutonic igneous rock composed of quartz, feldspar, and mica)

Sodalite

Sodalite (Na4Al3Si3O12Cl)

Magnetic Hematite

Magnetized Hematite (an iron oxide mineral, Fe2O3, that has undergone magnetization)