Mookaite Jasper
Silicified Radiolarite (Silicon Dioxide: SiO2)
sedimentary
Category
Industrial Byproduct (Anthropogenic Rock Like Material)
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Green Fluorite in Host Rock
Fluorite (Calcium Fluoride, CaF2)
mineral
Diamond
Carbon (C)
gemstone
Granite
Granite (Felsic intrusive igneous rock)
igneous
Polished white chalcedony or milky quartz pebble
Chalcedony, microcrystalline quartz (SiO₂), possibly with iron-oxide staining or a minor mineral inclusion
mineral
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Mica Schist
Medium-grade regional metamorphic rock (composition varies)
metamorphic
Quartzite
Quartzite (SiO2 silicon dioxide)
metamorphic
Opalite
Man-made glass (traditionally simulated Opal)
mineral
Chert (Grey-Green Var.)
Silicon Dioxide (SiO2)
sedimentary
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 cement)
sedimentary
Siltstone Pebble
Siltstone (composed of siliciclastic grains)
sedimentary
Polished pink-and-gray stone, likely rhodonite-bearing rock
Rhodonite (MnSiO₃) in a manganese-rich metamorphic matrix; exact identification requires testing
metamorphic
Granite
Granite (Felsic Plutonic Rock)
igneous
Pea Gravel / River Gravel
Unconsolidated Clastic Sedimentary Aggregate
sedimentary
Chert / Pink Chert
Silicon Dioxide (SiO2)
sedimentary
Conglomeratic sandstone or breccia
Lithic arkose / polymictic conglomeratic sandstone
sedimentary
Sandstone Pebble
Arenite (primarily SiO2)
sedimentary
Sandstone (Ferruginous)
Ferruginous Sandstone (SiO2 with Fe2O3)
sedimentary
Obsidian
Obsidian (Volcanic Glass; SiO2 content > 70%)
igneous
Polished Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (Green River Chert)
Microcrystalline Quartz (SiO2)
sedimentary
Red Granite
Phaneritic Plutonic Rock (High Potassium Feldspar)
igneous
Amygdaloidal Basalt
Amygdaloidal Basalt (extrusive volcanic rock with mineral inclusions)
igneous
Diamond (Set in Jewelry)
Carbon (C)
gemstone
Chert (Yellow Jasper/Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Polished rhyolite (likely porphyritic rhyolite)
Rhyolite, composed chiefly of quartz and alkali feldspar with minor plagioclase, biotite, and iron oxides
igneous
Chert (also known as Flint or Common Chalcedony)
Cryptocrystalline Silica (SiO2)
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Milky Quartz (Water-worn Pebble)
Silicon Dioxide (SiO2)
mineral
Pegmatite (Granitic Pegmatite with Quartz and Feldspar)
Intrusive Igneous Rock (Granitic Pegmatite)
igneous
Feldspar-rich igneous rock, likely granite or gneiss fragment
Granite-like quartz–feldspar rock; exact identification is uncertain from the blurred image
igneous
Mica Schist
Mica Schist (Main mineral constituents: Muscovite/Biotite, Quartz, Feldspar)
metamorphic
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Likely polished dark stone or glassy mineral bead
Indeterminate; possibly obsidian, hematite, or a dark agate
mineral
White Agate (Chalcedony)
Silicon Dioxide (SiO2)
mineral
Pink Himalayan Salt Rock (Halite)
Halite (Sodium Chloride, NaCl)
mineral
Quartz (likely Rose Quartz or Milky Quartz based on color)
Quartz (SiO2 - Silicon Dioxide)
Mineral
Muscovite Mica
Muscovite - KAl2(AlSi3O10)(OH)2
mineral
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Dyed Agate
Silicon Dioxide (SiO2) - variety Chalcedony
mineral