Chert (with Quartz veins)
Microcrystalline Quartz (SiO2)
sedimentary
Category
Man Made Object (Simulant)
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Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Chert (or potentially massive Quartz/Quartzite)
SiO2 (Silicon Dioxide)
sedimentary (if chert) / metamorphic (if quartzite)
Likely limestone or calcareous fossil fragment
Calcite-rich carbonate rock; possibly bioclastic limestone (CaCO₃)
sedimentary
Turquoise
CuAl6(PO4)4(OH)8·4H2O
mineral
Quartz (Float/Abraded)
Quartz (SiO₂)
Mineral
Pink Granite
Phaneritic Felsic Igneous Rock
igneous
Orange Quartz
Silicon Dioxide (SiO2) with iron inclusions
mineral
Diamond (Pear Cut)
Carbon (C)
gemstone
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone (likely Fossiliferous)
Arenite / Sedimentum arenaceum
sedimentary
Pumice and Scoria
Vesicular Volcanic Rock (Pumice: Silicic / Scoria: Mafic)
igneous
Multi-Gemstone Quartz Bracelet (Amethyst, Aventurine, Rose Quartz, Clear Quartz)
Silicon Dioxide (SiO2) mixture
gemstone
Quartz Grain
Silicon Dioxide (SiO2)
mineral
Granite
Phaneritic Felsic Igneous Rock (Granite)
igneous
Dyed Agate
Chalcedony (SiO2)
Mineral
Biotite (Black Mica)
K(Mg,Fe)3AlSi3O10(OH,F)2
mineral
Gemstone Tree Brooch (Agate and Quartz)
Silicon Dioxide (SiO2)
mineral
Turquoise
Turquoise (Hydrated copper aluminum phosphate, CuAl6(PO4)4(OH)8·4H2O)
Mineral
Granite
Granite (Mainly Quartz, Feldspar, and Mica)
igneous
Jadeite
Jadeite (NaAlSi2O6)
gemstone
Granite
Plutonic Granite
igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Tumbled Clear Quartz
Silicon Dioxide (SiO2)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Granite
Granite (Mainly Quartz SiO2, K-Feldspar KAlSi3O8, and Plagioclase)
igneous
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone or Limestone
Arenite or Calcareous Sedimentary Rock
Sedimentary
Sandstone
Arenicola (comprising mostly Quartz, SiO2)
sedimentary
Fossiliferous limestone
Calcarenite/bioclastic limestone, predominantly calcite (CaCO₃)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Clear Quartz Cluster
Quartz (Silicon Dioxide, SiO2)
mineral
Pumice
Pumice (Highly vesicular volcanic rock)
igneous
Schist
Mica Schist (Metamorphic Rock)
metamorphic
Aragonite Star Cluster
Aragonite (CaCO3)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Chert
Chert (SiO2, Silicon Dioxide)
sedimentary
Granite
Phaneritic Granitoid
igneous
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral