Mineral, Jewelry

Amber

Organic gemstone (Succinite is common if from the Baltic)

Blue Apatite

Apatite group (Ca5(PO4)3(F,Cl,OH))

Rose Quartz

Silicon Dioxide with trace inclusions (SiO2)

White Chalcedony (Agate)

Silicon Dioxide (SiO2)

Chalcedony (Common Opal/Chert variety)

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Snowflake Obsidian

Hydrated Volcanic Glass (primarily SiO2) with Cristobalite inclusions

Jasper Marble

Silicon Dioxide (SiO2) with Impurities

Clear Quartz Crystal Cluster

Silicon Dioxide (SiO2)

Agatized Petrified Wood

Silicon Dioxide (SiO2) - Chalcedony pseudomorph after Wood

Spinosaurid Dinosaur Tooth

Spinosaurus aegyptiacus (fossilized)

Goldstone

Aventurine Glass (Man-made)

Quartz (Smoky/Milky variety)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Quartz (Silicon Dioxide, SiO2)

Epidosite (Epidote-rich rock)

Epidosite (consisting primarily of Epidote: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH))

Included Quartz (Garden Quartz / Lodolite)

Quartz (SiO2) with various mineral inclusions

Diamond

Diamond (pure Carbon, C)

Malachite

Malachite (Cu2(CO3)(OH)2 - a copper carbonate hydroxide mineral)

Tiger's Eye

Pseudomorph of Crocidolite (SiO2 with iron oxides)

Smoky Quartz

Silicon Dioxide (SiO₂)

Carnelian

Carnelian (Silica, SiO2)

Dendritic Opal

Dendritic Common Opal (SiO2·nH2O with Manganese oxide inclusions)

Chalcedony (Moonstone-like Agate)

Silicon Dioxide (SiO₂)

Chrysocolla

Chrysocolla: Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O

Banded Agate

Agate (Silicon Dioxide - SiO2)

Larimar

Pectolite (Sodium Calcium Silicate Hydroxide) - (NaCa2(Si3O8)(OH))

Obsidian

Volcanic glass (SiO2 - Silicon Dioxide with impurities)

Lepidolite

K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2

White Moonstone (Scolicite or White Feldspar var. )

Lattice-structure Silicate (KAlSi3O8)

Rose Quartz

Silicon Dioxide (SiO2)

Gastropod Fossil (Snail Internal Mold)

Gastropoda; internal mold (steinkern), often composed of Calcium Carbonate (CaCO3) or Silica (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Green Fluorite

Calcium Fluoride (CaF2)

Strawberry Quartz

Silicon Dioxide (SiO2) with Hematite or Goethite inclusions

Jasper (likely Ocean Jasper or Variegated Jasper)

Silicon Dioxide (SiO2) with impurities

Green Aventurine (Green Quartzite)

Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)

K2 Jasper (K2 Granite)

Azurite in Granite (K(Mg,Fe)3AlSi3O10(OH,F)2 + Cu3(CO3)2(OH)2)

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Amazonite

Amazonite / Microcline (KAlSi3O8)

Green Aventurine

Aventurine Quartz (SiO2 + Muscovite/Fuchsite)

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Meteorite (Chondrite)

Stony Meteorite (Ordinary Chondrite)