Mineral, Often Found As A Rock (Metamorphic)

Blue Topaz (facetted in jewelry)

Aluminum silicate fluoride hydroxide (Al2SiO4(F,OH)2)

Gneiss

Gneiss

Chert (Flint Nodular)

Chert (Silicon dioxide, SiO2)

Yellow Quartz (Citrine or Iron-Stained Quartz)

Silicon Dioxide (SiO2)

Chert / Flint Nodules

Cryptocrystalline Quartz (SiO2)

Labradorite (a variety of Feldspar)

Labradorite; (Na,Ca)(Al,Si)4O8 (a plagioclase feldspar)

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Porphyritic Basalt (Chinese Writing Stone)

Porphyritic Basalt or Porphyritic Andesite

Quartzite Pebble

Quartzite (SiO2)

Banded Gneiss (River Rock/Pebble)

Gneiss (specifically a banded variety often found as a river rock)

Biotite Mica

K(Mg,Fe2+)3(Al,Fe3+)Si3O10(OH,F)2

Amethyst

Amethyst (Silicon Dioxide - SiO2)

Rose Quartz

Quartz (Silicon Dioxide) - SiO2

Jade

There are two distinct minerals commonly known as Jade: Nephrite (a calcium magnesium silicate - Ca2(Mg,Fe)5Si8O22(OH)2) and Jadeite (a sodium aluminum silicate - NaAlSi2O6). Based on the image showing a typically softer, more fibrous appearance, it is likely Nephrite.

Milky Quartz

Silicon Dioxide (SiO2)

Agate (Moss or Dendritic Agate)

Chalcedony (Silicon Dioxide, SiO2)

Quartz Vein in Gneiss or Basalt

Milky Quartz (SiO2) within Metamorphic Host Rock

Chert (Iron-stained)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Almandine Garnet

Iron aluminum silicate (Fe3Al2(SiO4)3)

Chert (and Flint variant)

Microcrystalline Quartz (SiO2)

Chert (Tan/Yellow variety)

Microcrystalline quartz (SiO2)

Quartz / Calcite Vein Rock

Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3)

River Cobble (Phyllite or Quartzite)

Metasedimentary Rock (often containing SiO2 or KAl2(AlSi3O10)(OH)2)

Serpentine (Serpentinite)

Serpentinite (complex silicate group including lizardite, chrysotile, and antigorite)

Schist

Mica Schist (primarily Muscovite and Quartz)

Unakite

Unakite (Metasomatized Granite)

Chert (specifically Yellow or River Chert)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Banded Flint / Chert

Silicon Dioxide (SiO2)

Serpentinite (Serpentine Rock)

Primarily composed of serpentine group minerals, such as antigorite, chrysotile, and lizardite. Chemical formula for serpentine minerals is (Mg,Fe)3Si2O5(OH)4.

Ruby in Fuchsite

Corundum (Al2O3) in Fuchsite (K(Al,Cr)3Si3O10(OH)2)

Chert (Quartz)

Microcrystalline Silica (SiO2)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Agate (Geode nodule)

Cryptocrystalline Quartz (SiO2)

Sandstone (with potentially metamorphic or basaltic bands)

Arenite / Lithic Wacke

Schist

Crystalline Schist (often containing Muscovite, Biotte, or Quartz)

Lapis Lazuli

Lazurite-dominant rock, (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2

Lava Stone and Chakra Beads

Basalt (with various mineral/synthetic beads)

Greenstone / Serpentinite

Serpentinite (composed primarily of minerals from the serpentine group Mg3Si2O5(OH)4)

Schist

Mica Schist (Quartz-Muscovite-Biotite Schist)

Chert (often called Flint when dark)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Serpentinite

Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)