Organic Gemstone (Not A Rock Or Mineral In The Traditional Sense, But Bio Mineralized Material)

Pyrite

Pyrite (Iron sulfide, FeS₂)

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals, Mg3Si2O5(OH)4)

Staurolite (Fairy Stone)

Staurolite (Fe2+2Al9Si4O23(OH))

Sunstone

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

Carnelian Agate Nodule

Silicon Dioxide (SiO2) - Carnelian Chalcedony

Red Sandstone

Arenite (predominantly SiO2 with Fe2O3)

Amethyst Quartz

Silicon Dioxide (SiO2 with iron impurities)

Clear Quartz

Silicon Dioxide (SiO2)

Aquamarine

Beryl (Be3Al2Si6O18 with trace Fe2+)

Amethyst (Chevron or Banded Amethyst)

Silicon Dioxide (SiO2) with iron impurities

Muscovite Mica

Muscovite (KAl₂(AlSi₃O₁₀)(F,OH)₂))

Garnet (Almandine)

Almandine, Fe3Al2(SiO4)3

Sandstone (Water-worn Pebble)

Clastic Sedimentary Rock (primarily SiO2)

Quartz (on matrix)

Quartz (Silicon Dioxide, SiO₂)

Scoria (Basaltic Lava Rock)

Vesicular Basalt

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.

Unakite

Epidote-Feldspar rock

Quartz / Quartzite

Silicon Dioxide (SiO2)

Muscovite Mica

Muscovite - KAl2(AlSi3O10)(OH)2

Amethyst

SiO2 (Silicon Dioxide with Iron impurities and natural radiation influence)

Clear Quartz Crystal

Silicon Dioxide (SiO2)

Black Obsidian

Volcanic Glass (predominantly SiO2, Silicon Dioxide)

Rough Emerald in Matrix

Beryl (Be3Al2Si6O18) with trace Chromium/Vanadium

Olivine (Peridot)

Magnesium Iron Silicate (Mg,Fe)2SiO4

Olivine (Peridot)

Magnesium Iron Silicate ((Mg, Fe)2SiO4)

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Quartz (Vein Quartz)

Silicon Dioxide (SiO2)

Sandstone

Arenite

Red Jasper

Jasper (Silicon Dioxide based crypto-crystalline Quartz with Iron inclusions)

Schist (Garnet-Mica Schist)

Garnet-Mica Schist (X-Y)3Z2(SiO4)3

Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Tiger's Eye

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

Carnelian Agate

Silicon Dioxide (SiO2) with iron oxide impurities

Olivine (Peridot in gem form)

Magnesium Iron Silicate (Mg,Fe)2SiO4

Sapphire (Corundum)

Corundum (Al2O3)

Clear Quartz (Rock Crystal)

Quartz (Silicon Dioxide, SiO2)

Diorite

Diorite (Intermediate intrusive igneous rock)

Jasper

Jasper (Silicate - SiO2)

Lazulite

Lazulite (Mg,Fe2+)Al2(PO4)2(OH)2

Citrine (Iron-stained Quartz)

Silicon Dioxide (SiO2)

Fire Agate

Chalcedony (Silicon Dioxide, SiO2) with Limonite/Goethite

Orange Quartzite / Carnelian Agate

Silicon Dioxide (SiO2)