Mineral With Metamorphic Or Igneous Host

Quartz Vein in Host Rock (often Granite or Schist)

Silicon Dioxide (SiO2) within host matrix

Quartz Vein in Host Rock

Silicon Dioxide (SiO2)

Emerald in Matrix

Beryl (Be3Al2Si6O18) with Chromium impurities

Morganite (Pink Beryl)

Beryllium aluminum silicate Be3Al2(SiO3)6

Quartz Vein / Quartz Matrix

Silicon Dioxide (SiO2)

Quartz with Muscovite Mica

Silicon Dioxide (SiO2) with Potassium aluminum silicate hydroxide fluoride [KAl2(AlSi3O10)(F,OH)2]

Milky Quartz

Silicon Dioxide (SiO2)

Rough Gemstone Grains (Mixed Sapphires and Quartz)

Corundum (Al2O3) and Quartz (SiO2)

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Bull Quartz with Mica and Host Rock

Massive Quartz (SiO2) with Muscovite/Chlorite inclusions

Milky Quartz Vein in Host Rock

Silicon Dioxide (SiO2)

Milky Quartz with inclusions

Silicon Dioxide (SiO2)

Cloud Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Bull Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Yellow Quartz (Citrine/Yellow Jasper mix)

Silicon Dioxide (SiO2)

Auriferous Quartz or Pyritic Ore

Iron Pyrite (FeS2) or Native Gold (Au) in Matrix

Emerald

Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities

Milky Quartz with Chlorite/Moss Infusions

Silicon Dioxide (SiO2)

Quartz (Milky Quartz with Iron Staining)

Silicon Dioxide (SiO2)

Milky Quartz (with Iron staining)

Silicon Dioxide (SiO2)

Quartz vein rock

Milky quartz with smoky quartz; chiefly silicon dioxide (SiO₂)

Gold-bearing quartz vein rock

Milky quartz (SiO₂) with probable native gold and iron-oxide staining

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Polished green-inclusion stone, likely chlorite-included quartz

Quartz (SiO₂) with chlorite inclusions; exact identification is uncertain from the photograph

Milky Quartz (Water-worn pebble/nodule)

Quartz (Silicon Dioxide - SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Pyrite in Quartz

Iron Sulfide (FeS2) in Silicon Dioxide (SiO2)

Sapphire

Corundum (Al2O3)

Tumbled milky quartz

Quartz (silicon dioxide, SiO₂)

Rutilated Quartz

Rutile in Quartz (SiO2 with TiO2 inclusions)

Rough amber-colored quartz or calcite fragment

Likely quartz (SiO₂) or calcite (CaCO₃); exact identification requires testing

Ruby (Pinkish-Red)

Corundum (Al2O3 with Chromium trace)

Rounded quartz-veined pebble

Likely quartz-veined metamorphic rock; exact host rock is indeterminate from the image

Gold-bearing Quartz Ore

Auriferous Quartz (SiO2 + Au)

Banded Gneiss with Quartz Vein

Gneiss containing SiO2 (Quartz) intrusion

Quartz Vein in Host Rock

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Auriferous Quartz (Gold-bearing Quartz)

Silicon Dioxide (SiO2) with trace Gold (Au) and Iron Oxides

Blue Apatite

Fluorapatite / Apatite (Ca5(PO4)3(F,Cl,OH))

Quartz (Drusy/Crystalline)

Silicon Dioxide (SiO2)