Sodalite beads
Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂
mineral
Category
Man Made Object (Metal Alloy)
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Diamond
C (Native Carbon)
gemstone
Diamond
Natural Diamond (Carbon, C)
gemstone
Polished serpentine pebble
Serpentinite, chiefly serpentine-group minerals (chrysotile, lizardite, antigorite)
metamorphic
Sodalite
Sodalite (Na4Al3Si3O12Cl)
Mineral
Blue Agate (Dyed)
Silicon Dioxide (SiO2)
Sedimentary (formed from silica deposits)
Optical Calcite
Calcium Carbonate (CaCO3)
mineral
Pegmatitic granite with dark mafic band
Granitic pegmatite; quartz–feldspar–mica assemblage, with biotite/amphibole-rich mafic material
igneous
Dalmatian jasper
Dalmatian stone, typically a leucocratic alkali-feldspar-rich porphyritic igneous rock with black arfvedsonite or aegirine inclusions
igneous
Sandstone
Arenite (SiO2 principal)
sedimentary
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Swirled Agate Bead
Silicon Dioxide (SiO2)
mineral
Mica-rich granite (likely biotite granite)
Biotite granite; mainly quartz (SiO₂), alkali/feldspar, and biotite mica
igneous
Diamond (or Diamond Simulant)
Carbon (C)
mineral
Green Slag Glass
Amorphous Silica / Glassy Blast Furnace Slag
Mineraloid (Industrial byproduct)
Optical Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Arsenopyrite in Quartz Matrix
Arsenopyrite (FeAsS) with Quartz (SiO2)
Mineral in a Metamorphic/Hydrothermal rock
Picture Jasper
Silicon Dioxide (SiO2) with iron oxide and clay inclusions
sedimentary
Quartz pebble in concrete
Quartz (SiO₂), embedded in Portland-cement concrete
mineral
Quartz (Microcrystalline/Chert)
Silicon Dioxide (SiO2)
mineral
Calcite
Calcium Carbonate (CaCO3)
mineral
Sandstone (likely Arkosic)
Clastic Sedimentary Rock (Sandstone)
sedimentary
Granite
Phaneritic Felsic Intrusive Igneous Rock
igneous
Granite
Intrusive Igneous Rock (Mainly Quartz, Feldspar, and Mica)
igneous
Granite
Phaneritic Felsic Igneous Rock
igneous
Lapis Lazuli
Lapis lazuli (primary mineral: Lazurite, (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)
metamorphic
Tumbled jasper, likely red/brown jasper
Microcrystalline quartz (chalcedony), SiO₂, colored chiefly by iron oxides
mineral
Weathered limestone pebble
Limestone, chiefly calcite (CaCO₃)
sedimentary
Polished dendritic jasper or agate slab
Microcrystalline quartz (SiO₂), likely jasper with chalcedony and iron/manganese dendrites
mineral
Chert (Nodule)
Silicon Dioxide (SiO2)
sedimentary
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
mineral
Chert (Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Granite
Granite (Intrusive Igneous Rock)
igneous
Calcite
Calcium Carbonate (CaCO3)
mineral
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Turquoise
CuAl6(PO4)4(OH)8·4H2O (Hydrous copper aluminium phosphate)
mineral
Red jasper fragment
Jasper, microcrystalline quartz (SiO₂) colored chiefly by iron oxides
mineral
Amethyst cluster
Amethyst, purple quartz (SiO₂)
mineral
Mica schist, likely biotite–muscovite schist
Mica schist; predominantly quartz, feldspar, biotite and/or muscovite mica. Exact mineral composition cannot be confirmed from the photograph alone.
metamorphic
Coquina / Fossiliferous Limestone
Fossiliferous Limestone (Calcite, CaCO3)
sedimentary
Flint
Silicon Dioxide (SiO2) - Chert variety
sedimentary