Man Made Object (Ring)

Tumbled opalite (likely synthetic glass)

Opalite; typically man-made opalescent soda-lime glass, not a recognized mineral species

Tumbled brown chalcedony or jasper

Microcrystalline quartz, SiO₂; possibly iron-bearing jasper

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Polished dendritic agate cabochon (likely agate or jasper)

Microcrystalline quartz, SiO₂, commonly chalcedony with iron-oxide inclusions

Petrified Wood

Silicified Wood (primarily SiO2)

Mixed small mineral specimens, likely quartz varieties

Uncertain from the image; translucent pieces may be quartz (SiO₂), while golden-brown pieces could be iron-stained quartz or calcite

Black Onyx

Silicon Dioxide (SiO2) with carbon impurities

US Penny

Cuprum (Copper: Cu) and Zincum (Zinc: Zn) Alloy

Brick

Fired clay or Ceramic material (no specific mineralogical scientific name as it's a composite)

Dark quartz point (possibly smoky quartz)

Quartz, SiO₂; the dark color may indicate smoky quartz, but the image is insufficient to confirm

Banded Sandstone

Arenite with Liesegang banding

Carnelian Agate

Silicon Dioxide (Chalcedony variety), SiO2

Petrified Wood

Silicified Wood (SiO2)

Sulemani Hakik (Eye Agate)

Chalcedony (SiO2)

Unidentifiable blurred specimen

Cannot be determined from the image

Agate

Silicon Dioxide (Chalcedony), SiO2

Carnelian (orange chalcedony)

Microcrystalline quartz, SiO₂; chalcedony variety colored mainly by iron oxides

Red Jasper (Tumbled)

Silicon Dioxide (SiO2) with iron oxide inclusions

Agate

Silicon dioxide (Chalcedony), SiO2

Carnelian cabochon

Orange-red variety of chalcedony (microcrystalline quartz), SiO₂

Black Onyx or Dyed Agate Node

Cryptocrystalline Quartz (SiO2)

Petrified Wood

Silicified Wood (primarily Quartz/Chalcedony, SiO2)

Mammoth Tooth

Mammuthus primigenius (Tooth fragment)

Polished orbicular jasper (likely ocean jasper)

Siliceous microcrystalline quartz/chalcedony with iron-oxide and volcanic inclusions; commonly called ocean jasper

Polished amethyst cabochon

Amethyst, purple quartz (SiO₂)

Red cabochon gemstone, likely carnelian

Carnelian: orange-red chalcedony, microcrystalline quartz (SiO₂)

Labradorite

Plagioclase Feldspar (Ca,Na)(Al,Si)4O8

Petrified Wood

Silicified wood (SiO2 - Silicon Dioxide)

Likely tumbled epidote-bearing rock or green jasper

Epidote-group silicate, possibly in a jasper or serpentinite matrix

Banded Calcite (often sold as 'Mexican Onyx')

Calcite (Calcium Carbonate - CaCO3)

Tumbled amethyst quartz

Quartz, silicon dioxide (SiO₂), purple variety colored mainly by iron impurities and irradiation

Obsidian (likely)

Volcanic glass; primarily silica-rich rhyolitic composition (approximately 70–75% SiO₂)

Jasper

Microcrystalline Quartz (SiO2)

Possible iron-rich meteorite fragment

Unidentified Fe–Ni meteoritic material; identification cannot be confirmed from this blurry image

Amazonite

KAlSi3O8 (Potassium Aluminum Silicate)

Chrysoprase

Silicon Dioxide (Chalcedony variety), SiO2

Petrified Wood

Silicified wood (Quartz/Chalcedony replacement of cellulose)

Red Jasper

Silicon Dioxide (Microcrystalline Quartz), SiO2

Crazy Lace Agate

Chalcedony (SiO2)

Wishing Stone (Quartz-veined Porphyritic Basalt)

Igneous rock with quartz vein (SiO2)

Diamond

Carbon (C)

Fossilized wood (petrified wood)

Silicified permineralized wood, commonly quartz (SiO₂) replacing or infilling woody tissue