Organic Gemstone (Succinite)

Yellow Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Chert (White-Tan variety)

Silicon dioxide (SiO2) / Microcrystalline Quartz

Chert (specifically Tan/Yellow Chert)

Chert (Microcrystalline or Cryptocrystalline Silica, SiO2)

Chert (Nodular)

Chert (SiO2 - Microcrystalline Quartz)

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Chert (Commonly known as Flint or Jasper when pigmented)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (variations include Flint/Jasper)

Cryptocrystalline Quartz (SiO2)

Chert (Flint)

Chert (Silicon Dioxide, SiO2)

Honey-colored amber (possibly copal)

Amber: fossilized tree resin, an organic mineraloid; composition varies, mainly carbon, hydrogen, and oxygen

Translucent amber-colored gemstone, likely citrine or amber

Most plausibly quartz (SiO₂), specifically citrine; amber would be fossilized resin (organic polymer)

Chert (Flint variety)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Red Jasper

Jasper (Silicon Dioxide, SiO2 with iron oxide impurities)

Chert (often called Flint when dark)

Chert (Microcrystalline or Cryptocrystalline Silica, SiO2)

Chert (often called Flint or Jasper)

Chert (Microcrystalline or Cryptocrystalline Silica, SiO2)

Chert / Flint

Cryptocrystalline Quartz (SiO2)

Chert (Commonly known as Flint)

Microcrystalline Quartz (SiO2)

Tumbled amber-like gemstone

Likely amber (fossilized resin; organic mineraloid), possibly citrine or yellow-brown glass imitation

Chert / Flint

Cryptocrystalline Quartz (Silicon Dioxide, SiO2)

Chert / Flint

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Amber (likely a small polished amber piece)

Natural fossil resin; amber is an organic mineraloid, not a crystalline mineral. The image alone cannot confirm authenticity.

Chert (varieties include Flint and Jasper)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Jasper variety)

Silicon Dioxide (SiO2)

Chert (specifically Flint or Jasper variant)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (and Chalcedony)

Microcrystalline Quartz (SiO2)

Chert (Cherty Flint/Jasper variety)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Pyrite

Pyrite (Iron sulfide, FeS₂)

Small yellow-orange mineral fragment, likely amber or iron-stained quartz

Possibly amber (fossilized resin; organic mineraloid) or quartz (SiO₂)

Pearl

Calcium Carbonate (Aragonite or Calcite) and Conchiolin

Red Coral

Corallium rubrum (Calcium Carbonate, CaCO3)

Amber-like beach pebble

Amber (fossilized tree resin), likely heavily weathered or resinous organic material; exact identification is uncertain from the image

Likely anthracite coal fragments

Anthracite; predominantly carbon (C), with minor mineral ash

Chert (Jasper variation)

Chert (SiO2)

Coral (Precious Coral)

Corallium rubrum (Red Coral), Paracorallium japonicum (Momo Coral), Pleurocorallium elatius (Sardinian Coral), various other species within the Corallidae family. Chemically, it's primarily Calcium Carbonate (CaCO 3 ).

Banded Chert

Cryptocrystalline Quartz (SiO2)

Pearl (Imitation or Cultured)

Calcium Carbonate (Aragonite/Calcite) - CaCO3

Mother of Pearl (Nacre)

Calcium Carbonate (primarily aragonite, with conchiolin)

Pyrite

Pyrite (FeS2)

Pearls

Aragonite (calcium carbonate) and Conchiolin

Hand-Drawn Trading Card (Amateur Artwork)

Cellulose-based substrate with wax/graphite/ink deposit (n/a for minerals)

Opalite (a synthetic glass, often confused with Opal)

Silicon dioxide glass (SiO2nH2O, for natural opal)

Amber

Fossilized Tree Resin (Amorphous Hydrocarbon)

Baroque Pearl (and potentially a small Sapphire/Blue Topaz)

Pearl: Calcium Carbonate (aragonite or calcite) with conchiolin. Sapphire: Aluminum Oxide (Al2O3). Blue Topaz: Al2SiO4(F,OH)2.