Metamorphic And Igneous

Green Aventurine

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

Jadeite (Jade)

Jadeite (NaAlSi2O6)

Rutilated Quartz

Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions

Alexandrite

Chrysoberyl (BeAl2O4 with Chromium impurities)

Prehnite

Calcium aluminum silicate hydroxide - Ca2Al(AlSi3O10)(OH)2

Green Aventurine

Aventurine Quartz (SiO2 with Fuchsite inclusions)

Banded Agate (Carnelian variety)

Cryptocrystalline Quartz (SiO2)

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Dyed Agate

Silicon Dioxide with artificial pigment (SiO2)

Sunstone

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

Schorl (Black Tourmaline)

NaFe3Al6Si6O18(BO3)3(OH)3OH (Iron tourmaline)

Ruby (Corundum)

Aluminium oxide (Al2O3) with Chromium traces

Hematite Nodule

Hematite (Fe2O3)

Red Aventurine

Aventurine Quartz (SiO2 + Hematite/Goethite)

Quartz / Milky Quartz

Silicon Dioxide (SiO2)

Banded Agate

Agate (Cryptocrystalline variety of Quartz, SiO2)

Specular Hematite

Specularite (Iron Oxide, Fe2O3)

Green Aventurine in Host Rock

SiO2 (Quartz with Fuchsite inclusions)

Green Aventurine

Aventurine Quartz (SiO2)

Calcite

Calcite (Calcium Carbonate, CaCO3)

Raw Emerald in Matrix

Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities

Jadeite (Jade)

Jadeite, NaAlSi2O6

Yellow Aventurine

Silicon Dioxide (Quartz) with inclusions (SiO2)

Arsenopyrite

Arsenopyrite (FeAsS)

Milky Quartz with Chlorite/Mica inclusions

Silicon Dioxide (SiO2) with phyllosilicate inclusions

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Specular Hematite (Specularite) in Matrix

Specularite (Fe2O3)

Granite (Orthoclase rich)

Granite (composed primarily of Quartz and Potassium Feldspar KAlSi3O8)

Pebble (likely a type of sandstone or quartzite pebble)

Clastic Sediment (specifically, a rudite-sized clast). If the pebble is composed of a specific rock type, its scientific name would be that rock type (e.g., 'Quartzite pebble', 'Granite pebble', 'Chert pebble'). Given its appearance, it is likely a metamorphic quartzite pebble or a hard sandstone pebble.

Aventurine (likely Green Aventurine)

Quartz (SiO2) with included minerals (Fuchsite or Chlorite for green color)

Quartzite

Quartzite (primarily SiO2)

Mica Schist

Mica Schist (primarily Muscovite and Biotite composition)

Quartzite Beach Pebble

Quartzite (primarily SiO2)

Epidote with Quartz and Feldspar

Ca2(Al2,Fe3+)(SiO4)3(OH) (Epidote complex)

Unakite

Epidotized Granite

Green Aventurine

Quartz (SiO2) with Fuchsite inclusions

Quartzite

Quartzite (SiO2)

Quartzite

Quartzite (SiO2)

Quartzite Cobble

Metamorphosed Quartz Sandstone (primarily SiO2)

Green Quartzite (Aventurine variety)

Silicon Dioxide (SiO2) with inclusions of Fuchsite

Quartzite Pebble

Quartzite (primarily SiO2)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)