Blue-green turquoise-like tumbled stone
Turquoise, hydrous copper aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O
mineral
Category
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Brecciated jasper (likely ocean jasper or rhyolitic jasper)
Silica-rich volcanic breccia composed mainly of microcrystalline quartz/chalcedony (SiO₂), with iron-oxide staining and possible feldspar
igneous
Tumbled dark red-brown stone, possibly jasper
Likely opaque microcrystalline quartz (chalcedony/jasper), SiO₂; exact identification is uncertain from the blurred photograph
gemstone
Tumbled jasper (likely brecciated or orbicular jasper)
Microcrystalline quartz (SiO₂), with iron-oxide inclusions
mineral
Flint
SiO2 (Cryptocrystalline Quartz / Chert)
sedimentary
Polished blue labradorite
Labradorite, calcium-rich plagioclase feldspar (approximately NaAlSi₃O₈–CaAl₂Si₂O₈)
mineral
Agate
Silicon Dioxide (Quartz), SiO2
mineral
Agate
Silicon dioxide (Chalcedony), SiO2
sedimentary
Tumbled ocean jasper or orbicular jasper
Microcrystalline quartz (SiO₂), commonly with chalcedony, feldspar, and iron-oxide inclusions
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Amber
Fossilized tree resin (Amorphous organic polymer)
gemstone
Agate
Silicon Dioxide (Chalcedony), SiO2
gemstone
Hematite
Iron(III) oxide (Fe2O3)
mineral
Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary
Agate
Silicon dioxide (Chalcedony), SiO2
sedimentary
Argillite
Argillite (Fine-grained sedimentary rock composed mostly of clay-sized particles)
sedimentary
Unakite
Altered Granite (Epidotized Granite)
metamorphic
Satin Spar Gypsum (Selenite Wand)
Calcium Sulfate Dihydrate (CaSO4·2H2O)
mineral
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
gemstone
Amber
Amber (Fossilized Tree Resin)
mineral
Pink Dyed Agate (Pink Agate Slice)
Silicon Dioxide (SiO2) - Chalcedony / Cryptocrystalline Quartz
mineral
Ruby Fuchsite / Ruby in Fuchsite
Ruby (Al2O3 variety corundum) and Fuchsite (K(Al,Cr)2AlSi3O10(OH)2 - a chromium-rich variety of muscovite mica) in Quartz matrix
Mineral
Red Jasper (Skull Carving)
Jasper (Silicon Dioxide, SiO2 plus Iron Oxide inclusions)
sedimentary
Agate
Agate (Silicon Dioxide, SiO2)
mineral
Mahogany Obsidian
Volcanic glass containing Magnetite/Hematite
igneous
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Amber
Succinates (Organic Fossilized Resin)
mineraloid
Rhodonite
Rhodonite (Mn,Fe,Mg,Ca)SiO3
mineral
Petrified Wood
Silicified Wood (SiO2)
mineral
Diamond
Carbon (C)
gemstone
Diamond (or Diamond Simulant)
Carbon (C)
mineral
Granodiorite with Quartz Veining
Granodiorite (containing Plagioclase Feldspar, Quartz, and Biotite/Hornblende) with Quartz (SiO2) veins
igneous
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Tektite
Impactite (Natural Silicate Glass)
meteorite
Chert (Flint)
Chert (Microcrystalline or cryptocrystalline Quartz - SiO2)
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Pink Marble
Recrystallized Limestone (Calcium Carbonate, CaCO3)
metamorphic
Fossil Shark Tooth
Carcharocles or Lamniformes (order)
fossil
Fossiliferous Limestone (Coquina)
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Chert (Field-collected Arrowhead-shaped Fragment)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Native Silver
Silver (Ag)
mineral