Sedimentary Or Metamorphic

Quartz Vein in Host Rock (Gneiss/Schist)

Silicon Dioxide (SiO2) within a metamorphic matrix

Pink Quartzite Pebble

Metamorphic Quartzite (SiO2 with iron oxide inclusions)

Banded Gneiss (River Cobble)

Gneiss (High-grade regional metamorphic rock)

White Marble

Recrystallized Calcite (CaCO3)

Schist (Micaceous Schist)

Micaceous schist (Mainly Muscovite/Biotite mixed with Quartz)

Jade

Jade can refer to two distinct minerals: Nephrite (a variety of the mineral actinolite, Ca2(Mg,Fe)5Si8O22(OH)2) and Jadeite (Na(Al,Fe3+)Si2O6). Based on the image, showing a relatively uniform green color and possibly slight translucence in bead form, it is very likely one of these, but determining which one from a photo is difficult without specific testing.

Magnetic Hematite

Magnetized Hematite (an iron oxide mineral, Fe2O3, that has undergone magnetization)

Epidote

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

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite mica

Smoky Quartz (Polished)

Silicon Dioxide (SiO2)

Mixed Gemstone Collection

SiO2 (Quartz varieties) and Biogenic CaCO3 (Nacre)

Blue Quartz (Aventurine)

Silicon Dioxide (SiO2) with inclusions of crocidolite or dumortierite

Serpentinite

Serpentine rock (Mg,Fe,Ni,Al,Zn,Mn)3(Si,Al,Fe)2O5(OH)4

Smoky Quartz

Silicon Dioxide (SiO2)

Aquamarine

Beryl (Be3Al2Si6O18)

Serpentinite

Serpentinite (group of hydrous magnesium iron phyllosilicates)

Green Aventurine

Aventurine Quartz (SiO2 + Fuchsite mica)

Smoky Quartz

Silicon Dioxide (SiO2)

Quartz Mineral

Silicon Dioxide (SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)

Blue Quartz (Dumortierite Quartz)

Silicon Dioxide with Aluminum Borosilicate (SiO2 + AlAl6BSi3O18)

Citrine

Crystalline Quartz (SiO2) with iron impurities

Black Tourmaline

Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)

Citrine

Citrine (Silicon Dioxide - SiO2)

Amethyst

Amethyst (Silicon Dioxide, SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)

Sunstone

Oligoclase (Feldspar variety), (Na,Ca)(Si,Al)4O8

Smoky Quartz

SiO2 (Silicon Dioxide)

Peach Moonstone

Potassium Aluminum Silicate, KAlSi3O8

Aventurine (Green Quartz)

Quartz with Fuchsite inclusions (SiO2 with K(Al,Cr)2(AlSi3O10)(OH)2)

Smoky Quartz

Silicon Dioxide (SiO2)

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite

Sodalite

Na8(Al6Si6O24)Cl2 (Sodium Aluminum Silicate Chloride)

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Aquamarine

Beryl (Be3Al2Si6O18 with Fe2+ trace elements)

Jadeite and Nephrite (Jade)

Sodium Aluminum Silicate (Jadeite) / Calcium Magnesium Iron Silicate (Nephrite)

Marble

Metamorphosed Limestone (mainly CaCO3)

Marble

Recrystallized Calcite (CaCO3)

Greenstone

Greenschist / Greenstone (contains epidote, chlorite, and actinolite)