Mineral, Jewelry

Dalmatian Jasper

Peralkaline rhyolite

Green Aventurine

Aventurine Quartz (SiO2 with Fuchsite inclusions)

Carnelian

Carnelian (Microcrystalline Quartz, SiO2)

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Banded Agate (specifically Sardonyx or Carnelian Agate)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Chalcedony (Moonstone variant or White Agate)

Silicon Dioxide (SiO₂)

Amazonite

Amazonite (KAlSi3O8 – a variety of Microcline, a Potassium Feldspar)

Obsidian

Volcanic glass (SiO2 - Silicon Dioxide with impurities)

Milky Quartz

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Clear Quartz Crystal

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Amber in Matrix

Succinite (Carbon-based organic polymer)

Obsidian

Obsidian (Amorphous volcanic glass, predominantly SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide inclusions)

Turquoise

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

Tiger's Eye

Silicon Dioxide (SiO2)

Moonstone

Orthoclase Feldspar ((K,Na)AlSi3O8)

Gold Nugget

Native Gold (Au)

Shale (Beach-worn)

Laminated Pelite (primarily clay minerals and quartz)

Jasper with Dendritic Inclusions

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Green Aventurine

Silicon Dioxide (SiO2) with Chromium-rich Fuchsite mica

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Clear Quartz Crystal

Quartz (Silicon Dioxide, SiO2)

Amazonite

K(AlSi3O8) - Lead-bearing Microcline (Tectosilicate)

Snowflake Obsidian

Volcanic glass containing Cristobalite (SiO2)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxides)

Labradorite (Carved)

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

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Jasper with Quartz inclusions

Silicon Dioxide (SiO2)

Diamond (Princess Cut Faceted Gemstone)

Native Carbon (C)

Yooperlite

Fluorescent Sodalite-bearing Syenite

Carnelian Agate

Silicon Dioxide (SiO2) - Carnelian variety of Chalcedony

Rhodonite, Gray Moonstone, and White Feldspar Mix

Multiple: MnSiO3 (Rhodonite), (K,Na)AlSi3O8 (Feldspar/Moonstone)

Carnelian (a variety of Chalcedony)

SiO2 (Silicon Dioxide with Iron Oxide impurities)

Quartz Druzy Geode

Silicon Dioxide (SiO2)

Carnelian Agate

Carnelian (Silicon Dioxide - SiO2)

Petrified Wood

Silicified Wood (primarily SiO2)

Man-made Metal Pin (Non-geological)

Antimony-Lead Alloy or Zinc/Brass Base with Electroplating