Milky Quartz

Silicon Dioxide (SiO2)

mineral

Jadeite

NaAlSi2O6 (Sodium Aluminum Silicate)

metamorphic

Amazonite

Microcline (KAlSi3O8) with lead impurities

mineral

Aventurine Quartz

Silicon Dioxide (SiO2) with inclusions of Fuchsite mica

mineral

Amethyst (Chevron or Banded Amethyst)

Silicon Dioxide (SiO2) with trace Iron (Fe)

mineral

Prehnite

Prehnite (Ca2Al(AlSi3O10)(OH)2)

mineral

Unakite

Epidotized Granite (SiO2 with Ca2(Al,Fe)3(SiO4)3(OH))

metamorphic

Yellow Jade

Jadeite or Nephrite (NaAlSi2O6 or Ca2(Mg,Fe)5Si8O22(OH)2)

metamorphic

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

mineral

Rutilated Prehnite

Prehnite - Ca2Al(AlSi3O10)(OH)2 with Epidote/Tourmaline inclusions

mineral

Lazulite

Magnesium Aluminum Phosphate Hydroxide (MgAl2(PO4)2(OH)2)

mineral

Unakite

Epidotized Granite

metamorphic

Smoky Quartz

Silicon Dioxide (SiO2)

mineral

Potassium Feldspar

Orthoclase (KAlSi3O8)

mineral

Diorite (Gneissic)

Diorite

igneous

Mica Schist

Mica Schist (Quartz-Biotit-Muscovite Schist)

metamorphic

Quartzite (River Pebble)

Quartzite (composed primarily of Silica, SiO2)

metamorphic

Blue Quartzite

Quartzite (primarily SiO2 with inclusions like Dumortierite or Magnesio-riebeckite)

metamorphic

Calcite

Calcite (Mineral, Calcium Carbonate - CaCO3)

Mineral

Quartzite Pebble

SiO2 (Silicon Dioxide)

metamorphic

Unakite

Epidotized Granite

metamorphic

Chlorite (Small Flakes/Sand)

Chlorite Group (Magnesium Iron Aluminum Silicate Hydroxide - (Mg,Fe)3(Si,Al)4O10(OH)2·(Mg,Fe)3(OH)6)

mineral

Rhodonite

Manganese Silicate (Mn,Fe,Mg,Ca)SiO3

mineral

Ruby

Corundum (Al2O3 with Chromium traces)

mineral

Ruby (Corundum)

Corundum (Aluminum Oxide) with chromium trace elements, Al2O3

mineral

Moonstone

Orthoclase Feldspar (containing Albite lamellae), (KAlSi3O8)

mineral

Quartz (on matrix)

Quartz (Silicon Dioxide, SiO₂)

Mineral

Quartzite

Quartzite (primarily composed of SiO O₂)

Sedimentary Rock

Tiger's Eye

Pseudomorph of quartz after crocidolite (SiO2 with iron oxide inclusions)

metamorphic

Quartzite with Chlorite

Metamosphosed Quartz Sandstone (SiO2 with (Mg,Fe)3(Si,Al)4O10(OH)2 inclusions)

metamorphic

Schist

Mica Schist

metamorphic

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.

Sedimentary rock