Sedimentary (Base), Then Artificial

Tumbled dark stone, possibly river pebble or hematite

Uncertain; candidates include hematite (Fe₂O₃), basalt, or dark chert

Aura Quartz (Pink/Rose Aura Quartz)

Silicon Dioxide (SiO2) bonded with Platinum and/or Silver

Concrete

Anthropogenic Sedimentary Rock (Hydrated Calcium Silicate)

Peacock ore (iridescent chalcopyrite)

Chalcopyrite, CuFeS₂, commonly surface-treated to enhance iridescence

Tumbled basalt pebble

Basalt, a fine-grained mafic volcanic rock; commonly plagioclase, pyroxene, and minor olivine or magnetite

Heat-Treated Citrine

Quartz (Silicon Dioxide, SiO2)

Heat-Treated Citrine

Silicon Dioxide (SiO2) with iron impurities

Pink Dyed Agate

Silicon Dioxide (SiO2) - Variety Agate

Dyed druzy quartz geode

Quartz, silicon dioxide (SiO₂), likely artificially dyed

Blue Dyed Agate Geode Slice

Chalcedony (Silicon Dioxide, SiO2) with artificial cobalt/iron-based dye

Crackle Agate / Dyed Quartz

SiO2 (Silicon Dioxide)

Conglomeratic aggregate / pebble-rich concrete-like rock

Polymictic conglomerate (likely glacial or beach-derived gravel matrix); exact identification uncertain from image

Limestone with Calcite Crust

Sedimentary Calcium Carbonate (CaCO3)

Fossiliferous limestone

Calcitic limestone, predominantly CaCO₃ (calcite), with possible shell or coral fossils

Polished leopard jasper (likely ocean jasper)

Silicified microcrystalline quartz/chalcedony; mainly SiO₂ with iron-oxide inclusions

Yellow tumbled stone, likely citrine or yellow calcite

Quartz (SiO₂), if citrine; alternatively calcite (CaCO₃)

Jasper (Multi-colored) / Sea Glass Slag

Silicon Dioxide (SiO2) with impurities of Iron Oxide

Pink Dyed Agate

Silicon Dioxide (SiO2) with synthetic pigment

Tumbled brown jasper / chert

Microcrystalline quartz (SiO₂), commonly called jasper or brown chert

Turquoise

Turquoise (Hydrated phosphate of copper and aluminium), CuAl6(PO4)4(OH)8·4H2O

Clear Quartz Crystal

Silicon Dioxide (SiO2)

Weathered stone, likely sandstone or altered volcanic rock

Indeterminate; possibly quartz-rich sandstone or weathered tuff

Dyed Pink Agate Slice

Cryptocrystalline variety of Quartz (SiO2)

Red-and-blue jasper (likely ocean jasper or dyed/polished jasper)

Microcrystalline quartz, chiefly SiO₂; jasper is an opaque chalcedony variety colored by iron oxides and other impurities

Rounded sandstone pebble

Quartz-rich sandstone (primarily quartz, with feldspar and iron-oxide cement)

Tumbled red jasper

Jasper, microcrystalline quartz (SiO₂) colored mainly by iron oxides

Dyed Agate Geode

Silicon Dioxide (SiO2) - Chalcedony variety

Painted River Pebble (likely Basalt or Greywacke)

Aphanitic Lithic Clast with Anthropogenic Pigment coating

Concrete aggregate surface

Human-made cementitious composite; primarily calcium-silicate-hydrate cement with mixed silicate aggregate

Dyed Blue Agate Slice

Chalcedony (Silicon Dioxide, SiO2)

Basalt cobble

Fine-grained mafic volcanic rock, chiefly plagioclase and pyroxene, commonly with olivine

Polished sedimentary pebble, likely sandstone or quartzite

Quartz-rich sandstone (SiO₂-dominant), possibly weakly metamorphosed quartzite

Tumbled Agate (Dyed Blue)

Silicon Dioxide (Chalcedony variety)

Tumbled carnelian (orange chalcedony)

Carnelian, a microcrystalline variety of quartz; silicon dioxide (SiO₂) colored mainly by iron oxides

Heat-Treated Citrine (Amethyst-based)

Quartz (Silicon Dioxide) - SiO2

Tumbled sandstone pebble

Sandstone, primarily quartz (SiO₂) with feldspar and iron-oxide cement

Hag Stone (Odin Stone / Adder Stone)

Perforated Pebble (commonly Chert, Mudstone, or Limestone)

Purple Chalcedony (likely dyed Agate)

Silicon Dioxide (SiO2)

Tumbled chert or jasper pebble

Microcrystalline quartz (SiO₂), commonly called chert; opaque varieties are jasper

Tumbled banded gneiss or amphibolite

Banded metamorphic rock, likely quartz–feldspar–biotite gneiss with amphibole

Dyed, polished stone—possibly rhodonite or pink jasper

Likely rhodonite (MnSiO₃) or manganese-rich jasper; exact identification requires testing

Amethyst (Agate/Chalcedony variety)

Silicon Dioxide (SiO2) with iron impurities