Man Made Object (Simulant)

Pyrite

Iron Disulfide (FeS2)

Asphalt (Bituminous Concrete)

Bituminous mix / Anthropogenic conglomerate

Metal Alloy (Jewelry)

Not a naturally occurring rock or mineral; likely a metal alloy for jewelry. Possible compositions include sterling silver (92.5% silver, 7.5% copper), or other silver/gold alloys.

Green Glass Cullet / Recycled Glass

Amorphous Silicon Dioxide (SiO2) with various metal oxides

Red jasper

Microcrystalline quartz (SiO₂), iron-oxide-rich chalcedony

Polished blue banded agate cabochon/ornamental slab

Microcrystalline quartz (chalcedony), SiO₂, with blue coloring or inclusions

Polished/tumbled jasper

Jasper, microcrystalline quartz (SiO₂) with iron-oxide and other mineral impurities

Polished chert or jasper cobble

Microcrystalline quartz (SiO₂), commonly called chert; iron-oxide-bearing varieties are jasper

Tumbled zebra calcite (likely calcite marble)

Calcite, CaCO₃; commonly recrystallized limestone/marble with dark graphite- or carbon-rich bands

Tumbled green stone, likely serpentine or nephrite jade

Serpentine-group minerals, commonly antigorite/lizardite; possible nephrite, a jade variety of tremolite–actinolite

Raw green fluorite (probable)

Fluorite, calcium fluoride (CaF₂)

Likely polished leopard-skin jasper or brecciated jasper

Jasper, an opaque microcrystalline variety of quartz (SiO₂), with iron-oxide and other mineral inclusions; exact variety cannot be confirmed from the image alone

Obsidian

Volcanic glass (Amorphous silicon dioxide)

Green Aventurine (likely)

Silicon dioxide (SiO2) with fuchsitemica inclusions

Chalcedony (variations like Agate or Jasper)

Chalcedony (SiO₂ - microcrystalline quartz)

Carnelian

SiO2 (Silicon Dioxide) - Translucent reddish-brown variety of Chalcedony

Nephrite Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

Kambaba Jasper

Stromatolite (Fossilized Algae)

Green Aventurine

Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)

Howlite (Tumbled)

Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)

Jasper (specifically Fancy or Polychrome Jasper)

Silicon Dioxide (SiO2) - Chalcedony

Carnelian

Carnelian (a variety of Chalcedony, SiO2)

Tumbled amethyst with possible lepidolite/colored quartz companion

Amethyst, purple quartz (SiO₂), likely with iron-related color centers

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Pyrite

Iron Sulfide (FeS2)

Obsidian (black volcanic glass)

Obsidian; primarily amorphous SiO₂-rich rhyolitic glass

Likely obsidian (possibly tektite or slag glass)

Volcanic glass; primarily SiO₂, noncrystalline

Howlite

Hydrated calcium boro-silicate (Ca2B5SiO9(OH)5)

Obsidian

Volcanic Glass

Obsidian

Volcanic Glass (Amorphous Silicon Dioxide)

Rose Quartz

Silicon Dioxide (SiO2) with trace impurities of titanium, iron, or manganese

Bronzite

(Mg,Fe)SiO3

Red Jasper

Jasper (SiO2, Silicon Dioxide with Iron inclusions)

Citrine

Quartz (SiO₂)

Rhodonite

Rhodonite (MnSiO3)

Jade

Jadeite or Nephrite (both are commonly referred to as 'jade'). Jadeite: NaAlSi2O6; Nephrite: Ca2(Mg,Fe)5Si8O22(OH)2.

Mahogany Obsidian

Obsidian (volcanic glass with Hematite/Magnetite inclusions)

Banded Onyx (Green Onyx)

Banded Calcite or Travertine (CaCO3)

Brown Jasper

Silicon Dioxide (SiO2)

Howlite

Howlite (Calcium borosilicate hydroxide, Ca2B5SiO9(OH)5)

Obsidian

Obsidian (volcanic glass, amorphous silica rich rock)

BROWN GRANITE (likely 'Tan Brown' or similar)

Granite (specifically a variety rich in orthoclase feldspar, often with biotite and possibly hornblende)