Sedimentary (Primary) With Artificial Modification

Turquoise

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

Purple Agate (Dyed Chalcedony)

SiO2 (Silicon Dioxide) with organic dyes

Dyed Blue Agate

Chalcedony (SiO2) with artificial dye

Pink Dyed Agate

Chalcedony (SiO2) with artificial dyes

Blue Dyed Agate

Chalcedony (SiO2) with artificial pigment

Slag (Industrial Byproduct)

Artificial silicate/iron byproduct

Tumbled brown jasper / chert

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

Concrete aggregate surface

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

Weathered stone, likely sandstone or altered volcanic rock

Indeterminate; possibly quartz-rich sandstone or weathered tuff

Conglomeratic aggregate / pebble-rich concrete-like rock

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

Clear Quartz Crystal

Silicon Dioxide (SiO2)

Likely vertebra fossil or bone fragment

Indeterminate fossilized vertebra; mineralized hydroxyapatite, commonly Ca₅(PO₄)₃(OH)

Dyed Agate Geode

Silicon Dioxide (SiO2) - Chalcedony variety

Polished lapis lazuli

Lapis lazuli: lazurite-rich rock, chiefly Na3Ca(Si3Al3)O12S; commonly contains calcite and pyrite

Tumbled amethyst

Amethyst, purple variety of quartz (SiO₂)

Blue Agate Geode Slice

Silicon Dioxide (SiO2) - Chalcedony variety

Dyed Agate

Silicon Dioxide (SiO2) - variety Chalcedony

Painted River Pebble (likely Basalt or Greywacke)

Aphanitic Lithic Clast with Anthropogenic Pigment coating

Rounded sandstone pebble

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

Dyed Agate

SiO2

Titanium Quartz (Aura Quartz)

Silicon Dioxide (SiO2) treated with Titanium

Red Dyed Howlite

Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)

Dyed and Crackle Agate

Silicon dioxide (chalcedony, SiO2)

Green Agate

Silicon Dioxide (Chalcedony), SiO2

Dyed Quartz Crystals

Silicon Dioxide (SiO2) with artificial pigment

Polished sedimentary pebble, likely sandstone or quartzite

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

Dyed Blue Agate Slice

Chalcedony (Silicon Dioxide, SiO2)

Dyed Agate Slice

Silicon Dioxide (SiO2) - Chalcedony variety

Pyrite

Iron Sulfide (FeS2)

Tumbled red jasper

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

Ferrochrome Slag

Anthropogenic silicate/oxide glass (Complex silicate matrix with Cr-Fe-Si inclusions)

Purple Tiger's Eye

Silicon dioxide with crocidolite inclusions (SiO2)

Hag Stone (Odin Stone / Adder Stone)

Perforated Pebble (commonly Chert, Mudstone, or Limestone)

Dyed Pink Agate Slice

Cryptocrystalline variety of Quartz (SiO2)

Yellow jasper pebble (possibly iron-stained chert)

Microcrystalline quartz, SiO₂; jasper is an opaque variety of chalcedony

Aqua Aura Quartz

Titanium/Gold-coated Silicon Dioxide (SiO2)

Blue Topaz

Al2SiO4(F,OH)2

Likely polished black-and-white stone fragment

Indeterminate from image; possibly tourmalinated quartz, black-and-white jasper, or coated stone

Dyed Agate

Silicon dioxide (SiO2) with artificial colorant

Tumbled Agate (Dyed Blue)

Silicon Dioxide (Chalcedony variety)

Purple Chalcedony (likely dyed Agate)

Silicon Dioxide (SiO2)

Likely weathered quartz-rich rock fragment

Uncertain; possibly quartz sandstone or a pale feldspathic rock