Metamorphic Rock (For Nephrite And Some Jadeite); Mineral (For Jadeite)

Epidote

Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)

Almandine Garnet

Iron aluminum silicate (Fe3Al2(SiO4)3)

Schist

Mica Schist (Medium-grade metamorphic rock)

Fluorite and Rose Quartz

Fluorite (CaF2), Rose Quartz (SiO2)

Mica Schist

Mica Schist (predominantly Muscovite/Biotite)

Jasper (Iron-stained Chert)

Silicon Dioxide (SiO2)

Rough Garnet in Matrix

Almandine Garnet (Fe3Al2Si3O12)

Quartz (likely Milky Quartz or Chalcedony)

Quartz (SiO2 - Silicon Dioxide)

Greenschist

Chlorite schist (Metamorphic rock dominated by chlorite, epidote, and actinolite)

Smoky Quartz

Silicon Dioxide (SiO2)

Pink Sapphire

Corundum (Al2O3 with trace Chromium and Iron)

Greenschist

Greenschist facies rock (containing chlorite, actinolite, and epidote)

Ferruginous Sandstone

Sandstone, Iron-rich

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Slate

Foliated Metamorphic Rock (primarily composed of Muscovite, Chlorite, and Quartz)

Epidote (likely Pistacite in Epidosite rock)

Epidote: Ca2(Al,Fe)3(SiO4)3(OH)

Schist

Mica Schist (primarily Muscovite or Biotite sheet silicates)

Aventurine (likely Green Aventurine)

Aventurine (a variety of quartz, SiO₂, with common inclusions of fuchsite)

Cherry Creek Jasper (also known as Red Creek Jasper or Cherry Creek Agate)

Jasper, microcrystalline quartz (SiO₂)

Slate

Foliated Metamorphic Rock (primarily composed of quartz, illite, chlorite, and micas)

Conglomerate

Conglomerate (a clastic sedimentary rock)

Lapis Lazuli

Lapis Lazuli (a rock composed primarily of Lazurite)

Yellow Quartzite River Cobble

Meta-quartzite (SiO2 with iron oxide staining)

Mica Schist

Medium-grade regional metamorphic rock (composition varies)

Slate

Slate (foliated metamorphic rock rich in quartz, sericite, and chlorite)

Quartzite

Quartzite (primarily SiO2)

River Stone / Pebble

Clastic Sediment (composed largely of Quartz, Feldspar, and various rock fragments)

Quartz Vein in Host Rock (Pebble)

Quartz (SiO2) with sandstone or siltstone matrix

Labradorite (likely Black Labradorite or Larvikite)

Labradorite (Na,Ca)(Al,Si)4O8. If a rock, it is typically anorthosite, gabbro, or norite, or a variety of syenite called Larvikite if it is specifically from Larvik, Norway.

Quartz Geode/Cluster

Quartz (SiO2)

Banded Chert

Chert (a microcrystalline variety of quartz, SiO2 with minor impurities)

Sandstone

Sandstone (composed primarily of sand-sized minerals or rock grains)

Quartz Vein in Host Rock (Gabbro or Basalt)

Silicon Dioxide (SiO2) with Mafic Silicates

Serpentinite

Serpentinite (composed primarily of mineral group (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4)

Onyx Marble (also commonly called Onyx)

Calcite (CaCO3), often with other mineral impurities

Mica Schist

Mica Schist (primarily Muscovite and Biotite phyllosilicates)

Jasper and Aquamarine (likely)

Jasper (Cryptocrystalline Quartz (SiO2)), Aquamarine (Beryl (Be3Al2Si6O18))

Citrine

Quartz (SiO2) - specifically, a variety of macrocrystalline quartz

Mixed Tumbled Gemstones and River Rocks

Mixed Decorative Stones (predominantly Silicon Dioxide - SiO2 variants)

Gneiss

Gneiss (High-grade metamorphic rock typically composed of Quartz, Feldspar, and Mica/Amphibole)

Quartz

Silicon Dioxide (SiO₂)

Quartz

Quartz (Silicon Dioxide, SiO2)