Decorative gemstone-chip jewelry (likely turquoise, coral, and assorted beads)
Predominantly turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O; other pieces appear to be dyed coral or red stone, and possibly shell/metal components
gemstone
Category
Not A Rock (Man Made Polymer)
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Sandstone
Arenite (SiO2 principal)
sedimentary
Lapis Lazuli (polished cabochon)
Lazurite-rich metamorphic rock (approx. Na6Ca2Al6Si6O24(SO4,S,Cl)2)
metamorphic
Red Jasper
Silicon Dioxide (SiO2) with Hematite (Fe2O3)
sedimentary
Riverstone (Sandstone Pebble)
Arenite (SiO2 with various lithic fragments)
sedimentary
Fine-grained gray stone, possibly slate
Slate (fine-grained metamorphosed mudstone); identification is uncertain from the image
metamorphic
Faceted brown gemstone pendant, likely smoky quartz or champagne topaz
Probably quartz (SiO₂), smoky variety; alternatively topaz (Al₂SiO₄(F,OH)₂)
gemstone
Quartzite
Quartzite (Metamorphic Quartz Sandstone)
metamorphic
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Snowflake Obsidian
Volcanic glass with Cristobalite inclusions (70–75% SiO2)
igneous
Banded Chert (River Stone)
Silicon Dioxide (SiO2)
sedimentary
Sandstone
Arenite
sedimentary
Amethyst (Resin Carving/Orgonite)
Silicon Dioxide (SiO2) with iron impurities
mineral
Sandstone (likely Quartzose Sandstone)
Arenite
sedimentary
Granodiorite with Quartz Veining
Granodiorite (containing Plagioclase Feldspar, Quartz, and Biotite/Hornblende) with Quartz (SiO2) veins
igneous
Granodiorite
Granodiorite
Igneous
Granite
Phaneritic plutonic rock (Quartz, Feldspar, Mica)
igneous
Granite
Granite (a phaneritic intrusive igneous rock)
igneous
Polished orbicular granite heart
Granite, commonly quartz–alkali feldspar–plagioclase–biotite granite; exact locality-dependent
igneous
Petoskey Stone
Hexagonaria percarinata (Fossilized Coral)
sedimentary
Granodiorite
Granodiorite
igneous
Swirled Agate Bead
Silicon Dioxide (SiO2)
mineral
Diorite
Diorite (Plagioclase feldspar and amphibole/biotite)
igneous
Diamond (in a gold ring)
Diamond (pure carbon, C)
mineral
Granite
Granite (phaneritic felsic intrusive rock)
igneous
N/A - Image does not contain a rock or mineral
Anthropogenic textile material
Non-geological
Granite
Phaneritic Felsic Igneous Rock (primarily Quartz, Feldspar, and Mica)
igneous
Coquina
Bioclastic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Banded Sandstone
Arenite with Liesegang banding
sedimentary
Granite
Phaneritic Plutonic Felsic Rock (SiO2, KAlSi3O8, NaAlSi3O8, CaAl2Si2O8)
igneous
Yellow-orange amber
Fossilized tree resin; amber is an organic mineraloid, not a true mineral
fossil
Amber
Succinate (Fossilized Tree Resin)
mineraloid
Sandstone (specifically Arkose or Quartz Arenite)
Arenite (primarily SiO2 with possible Feldspar)
sedimentary
Diorite
Diorite (Intermediate intrusive igneous rock)
igneous
Basalt
Basalt (containing plagioclase, pyroxene, and olivine)
igneous
Small dark rock fragment
Uncertain; possibly weathered basalt or slag
mineral
Lapis Lazuli
Na8(Al6Si6O24)S2 (composed primarily of Lazurite, Calcite, and Pyrite)
metamorphic
Bauxite
Bauxite (Mixture including Gibbsite Al(OH)3, Boehmite γ-AlO(OH), and Diaspore α-AlO(OH))
sedimentary
Amber
Fossilized tree resin (Amorphous organic polymer)
gemstone
Tumbled yellow jasper or chalcedony
Microcrystalline quartz, SiO₂; likely iron-oxide-bearing jasper/chalcedony
mineral
Chert (Chert / Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Diamond
Carbon (C)
gemstone