Mineral With Metamorphic Or Sedimentary Host

Mica in Quartz Host

Muscovite (KAl2(AlSi3O10)(OH)2) in Quartz (SiO2)

Lapis Lazuli (in Matrix)

Lazurite-bearing Metamorphic Rock (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2

Ptygmatic Migmatite

Migmatite (consisting of Neosome and Paleosome fractions)

Greenstone / Serpentinite

Serpentine-group / Altered Mafic Rock

Lapis Lazuli

Na8[Al6Si6O24]S2 (Lazurite component), a rock composed primarily of Lazurite, Calcite, and Pyrite

Emerald in Matrix

Beryl (Be3Al2Si6O18) containing Chromium/Vanadium impurities

White Quartz

Silicon Dioxide (SiO2)

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Likely quartz-bearing rock or quartz crystal fragment

Quartz, silicon dioxide (SiO₂), possibly with iron-stained matrix

Agate

Silicon Dioxide (SiO2)

Ruby

Corundum (Al2O3) with Chromium traces

Lapis Lazuli (Raw Ore)

Na8[Al6Si6O24]n(S,Cl,SO4,OH)2 (Lazurite component)

Yellow Jasper

SiO2 (Silicon Dioxide)

Garnet in Matrix

Almandine/Grossular Garnet in Pegmatite or Schist

Tiger's Eye

Silicon Dioxide (SiO2) with Limonite/Goethite pseudomorphs after Crocidolite

Vein Quartz in Basalt or Mafic Rock

Silicon Dioxide (Quartz veins in volcanic host rock)

Jadeite

Jadeite (NaAlSi2O6)

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) within Metasedimentary or Igneous Matrix

Exposed aggregate concrete (stone-chip surface)

Portland-cement concrete containing natural aggregate; not a natural rock

Quartz Geode

Silicon Dioxide (SiO2) in a sedimentary host

Quartz Vein in Sandstone

Sandstone with Hydrothermal Quartz (SiO2)

Rough Star Sapphire (Corundum)

Al2O3 (Aluminum Oxide)

Quartz (Smoky Quartz variant)

Silicon Dioxide (SiO2)

Quartz (Milky/Crystalline)

Silicon Dioxide (SiO2)

Agate Nodule / Chalcedony

Silicon Dioxide (SiO2)

Ruby and Diamond in Gold Setting

Corundum (Al2O3) and Diamond (C)

Greenstone / Serpentinite

Serpentinite (composed primarily of serpentine minerals: Mg3Si2O5(OH)4)

Worn River Pebble with Fossil Indentation

Sedimentary Rock with Fossil Infill

Quartz with Chlorite / Greenschist

Quartz vein in Greenschist (SiO2 with Chlorite group minerals)

Jasper

Silicon dioxide (SiO2) with impurities

Calcite on Host Rock

Calcium Carbonate (CaCO3)

Fuchsite in Quartz

Muscovite (KAl2(AlSi3O10)(OH)2) containing Chromium + Quartz (SiO2)

Quartz (Vein Quartz)

Silicon Dioxide (SiO2)

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) in Altered Host Rock

Chert Pebble with Quartz Vein

Microcrystalline Quartz (SiO2)

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4)

Emerald in Matrix

Beryl (Be3Al2Si6O18) with trace amounts of Chromium/Vanadium

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Quartz Geode

Silicon Dioxide (SiO2)

Emerald (Tumbled Beryl)

Beryllium Aluminum Silicate (Be3Al2Si6O18) with Chromium/Vanadium impurities

Sandstone (with Lichen)

Arenite (composed primarily of SiO2)

Quartz Geode in Sedimentary Host Rock

Silicon Dioxide (SiO2) in Carbonate Matrix