Organic Gemstone (Not A Rock Or Mineral)

Amber (likely a small rough amber piece)

Fossilized plant resin; amber is an organic mineraloid, not a crystalline mineral

Amber

Fossilized Tree Resin

Precious Red Coral

Corallium rubrum (Calcium Carbonate, CaCO3)

Chipped Glass/Plastic Fragment

Silicon dioxide (SiO2) for glass (amorphous) or various polymer compounds for plastic

Jasper

Silicon dioxide (SiO2)

Amber

Organic gemstone (Succinite)

Amber

Succinates (Organic Gemstone)

Herkimer Diamond

Quartz (Silica - SiO2)

Ferruginous Quartz

Silicon Dioxide (SiO2) with Hematite/Limonite impurities

Precious Coral (Red Coral)

Corallium rubrum (Calcium Carbonate, CaCO3)

Amber and Citrine Quartz

Succinite (Amber) and Silicon Dioxide (SiO2 / Citrine)

Moss Agate

Silicon Dioxide (SiO2) with inclusions

Agate (Moss or Green Agate)

Silicon Dioxide (SiO2)

Amber (Copal)

Succinite (fossilized resin)

Amber

Succinicum (C10H16O)

Turquoise-and-coral silver jewelry brooch

Turquoise: hydrated copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O; red cabochons appear to be coral, likely set in silver

Moss Agate / Chalcedony

Silicon Dioxide (SiO2)

Raw Amber / Resin Mineral

Succinite (Fossilized Tree Resin)

Red coral cabochon (likely dyed or reconstructed coral)

Corallium rubrum or other calcareous coral; chiefly aragonite (CaCO₃)

Amber (Copal)

Fossilized Tree Resin

Petrified Wood

Silicified Wood (SiO2)

Green Moss Agate

Silicon Dioxide (SiO2) with Mineral Inclusions

Portable Ceramic Space Heater

Polished Acrylonitrile Butadiene Styrene (ABS) Plastic with Ceramic Heating Elements

Chalcedony

Cryptocrystalline Quartz (SiO2)

White Coral

Corallium rubrum (biocarbonate calcium) / CaCO3

Polished plume agate

Chalcedony (microcrystalline SiO₂) with iron-oxide inclusions

Petrified Wood

Silicified wood (primarily Silicon Dioxide, SiO2)

Rough Amber (likely Copal or immature Amber)

Organic gemstone / Succinite (if Baltic)

Pink Coral

Corallium rubrum (Calcium Carbonate, CaCO3)

Pink Opal

Amorphous Hydrous Silica (SiO2·nH2O)

Moss Agate

Silicon Dioxide (SiO2) with inclusions of Manganese or Iron oxides

Likely bituminous coal

Coal, predominantly carbon-rich organic matter; exact rank cannot be confirmed from the image

Amber

Succinicum (Organic Gemstone - Resinite)

Amber (specifically Cherry Amber)

Succinite (with the chemical formula C10H16O)

Fossil bivalve shell

Likely an extinct or modern-like ribbed cockle/scallop; exact genus requires locality and diagnostic hinge features

Tufa Rock and Tumbled Gemstones

Calcareous Tufa (Calcium Carbonate, CaCO3)

Turquoise and Red Coral

CuAl6(PO4)4(OH)8·4H2O (Turquoise) and Corallium rubrum (Red Coral)

Chert (Jasper)

Microcrystalline Quartz (SiO2)

Polished moss agate (likely dendritic agate)

Chalcedony, microcrystalline quartz (SiO₂), with inclusions of manganese/iron oxides or hornblende

Pearl

Nacre (aragonite, CaCO₃, with conchiolin)

Tumbled brown agate (likely moss or plume agate)

Microcrystalline quartz, chiefly chalcedony (SiO₂), with iron-oxide and possibly mineral inclusions

Amber (Raw)

Succinite (Fossilized Resin)