Diorite
Diorite (Intermediate intrusive igneous rock)
igneous
Category
Mineral Based Alloy (Anthropogenic)
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Chert (Iron-stained)
Silicon Dioxide (SiO2)
sedimentary
Diorite (Salt and Pepper Rock)
Phaneritic Plutonic Diorite; chemical composition roughly 52-63% silica (SiO2)
igneous
Soapstone
Steatite (composed primarily of Talc: Mg3Si4O10(OH)2)
metamorphic
Basalt (Vesicular)
Vesicular Basalt
Igneous
Quartz-veined Basalt
Basalt with Quartz Infill (SiO2 + Fe/Mg Silicates)
igneous
Pink Granite
Granite (Phaneritic igneous rock)
igneous
Basalt
Mafic Volcanic Rock (composed of Plagioclase Feldspar and Pyroxene)
igneous
Ferruginous Sandstone
Arenite with Iron Oxide cement (Fe2O3 / FeO(OH))
sedimentary
Lepidolite Bracelet
Lepidolite (K(Li,Al)3(Si,Al)4O10(F,OH)2) often in Quartz matrix
Mineral
Basalt with Quartz/Calcite Veins
Basalt (Aphanitic Mafic Igneous Rock)
igneous
Red Rhyolite Porphyry
Rhyolite (Porphyritic texture)
igneous
Basalt with Quartz Veins
Basalt (complex silicate) with Quartz (SiO2) intrusions
igneous
Diamond (or Cubic Zirconia)
Carbon (C) or Zirconium Dioxide (ZrO2)
gemstone
Bloodstone
Heliotrope (cryptocrystalline Quartz, SiO2 with inclusions of Hematite)
sedimentary
Kambaba Jasper
Stromatolite (Fossilized Algae)
sedimentary
Granodiorite
Granodiorite (phaneritic intrusive igneous rock)
igneous
Beryl (Variety Mix)
Be3Al2(Si6O18)
Mineral
Diorite
Diorite (Intermediate intrusive igneous rock)
igneous
Man-made Carved Stone (Scream Mask/Skull motif)
Carved Soapstone or Serpentine-rich rock
Anthropogenic (Man-made artifact)
Sea Glass (Cobalt Blue)
Amorphous Silica (Glass with Cobalt additives)
Anthropogenic specimen (man-made)
Basalt
Mafic volcanic rock (formula varies by mineral content: Ca-plagioclase, Pyroxene, Olivine)
igneous
Titanium Coated Aura Quartz (Apple Aura Quartz)
Silicon Dioxide (SiO2) with Metallic Vapor Deposition Coating
Mineral (Man-modified)
Engineer Quartz/Quartzite
SiO2 (Silicon Dioxide with binders)
Sedimentary or metamorphic-derived
Basalt (Weathered Pebble)
Extrusive mafic igneous rock; minerals primarily Plagioclase feldspar and Pyroxene
igneous
Coquina
Coquina (Bioclastic Limestone)
sedimentary
Breccia
Clastic Breccia (SiO2/CaCO3 dominated)
sedimentary
Mica Schist
Mica Schist (Composition typically includes Muscovite KAl2(AlSi3O10)(OH)2 and Quartz SiO2)
metamorphic
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals usually (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4)
metamorphic
Basalt River Pebble
Basalt
igneous
Crushed Stone / Gravel (Multiple Rock Types)
Lithic fragments (undifferentiated)
Igneous, Sedimentary, and Metamorphic mix
Granite
Plutonic Igneous Rock (Granite)
igneous
Pink Granite
Phaneritic intrusive igneous rock (Felsic)
igneous
Granite Pebble
Granite (composed primarily of Quartz, Feldspar, and Mica)
igneous
Granite
Granite (Phaneritic Quartz-Feldspar-Mica composite)
igneous
Basalt River Pebble
Basalt (Aphanitic Mafic Volcanic Rock)
igneous
Limestone with Chert
Calcium Carbonate (CaCO3) with Silica (SiO2) inclusions
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Andesite River Stones
Andesite
igneous
Granite
Intrusive igneous rock (SiO2 rich)
igneous
Limestone
Calcareous sedimentary rock (CaCO3)
sedimentary
Granite (Weathered)
Grano-diorite / Granite (SiO2 rich intrusive rock)
igneous