Mineral With Metamorphic Or Igneous Host

Sodalite

Sodalite [Na8(Al6Si6O24)Cl2]

Basalt with Garnet inclusions

Basalt containing Nesosilicate (Garnet Group, likely Almandine Fe3Al2Si3O12)

Milky Quartz

Silicon Dioxide (SiO2)

Emerald

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

Sunstone

Plagioclase Feldspar (specifically Oligoclase variety containing hematite or goethite inclusions)", composition: (Ca,Na)(Al,Si)2Si2O8

Quartz Vein in Gneiss or Schist

Silicon dioxide (SiO2) within metamorphic host rock

Moss Agate

Silicon Dioxide (Chalcedony variety)

Raw Agate (Rough Agate Nodule)

SiO2 (Microcrystalline Quartz / Chalcedony)

Black Tourmaline (Schorl)

Sodium Iron Aluminum Borate Silicate (NaFe3Al6(BO3)3Si6O18(OH)4)

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) in matrix

Agate (Laguna or Lace variety pattern)

Silicon Dioxide (SiO2)

Pegmatite (Granitic Pegmatite with Quartz, Feldspar, and Mica)

Granitic Pegmatite

Garnet-bearing Schist / Conglomerate Specimen

Metamorphic rock with almandine garnet porphyroblasts

Azurite in Matrix

Azurite (Cu3(CO3)2(OH)2) in Rhyolite or Sandstone matrix

Feldspar (specifically Orthoclase)

Potassium Aluminum Silicate (KAlSi3O8)

Granite with Epidote

Granite, containing quartz, feldspar, and epidote

Quartz Vein in Basalt or Sedimentary Host Rock

Silica-veined lithic fragment (SiO2 in host matrix)

Dendritic Agate

Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions

Gold-bearing Quartz Ore

Auriferous Quartz (SiO2 with Au)

Granitic Pegmatite Intrusion in Host Rock

Pegmatite dike in amphibolite or schist

Milky Quartz

Silicon Dioxide (SiO2)

Agate (Brecciated / Moss Agate with Jasproid Inclusions)

Silicon Dioxide (SiO2)

Tiger's Eye

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

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Epidote

{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)

Turquoise

Hydrated phosphate of copper and aluminum - CuAl6(PO4)4(OH)8·4H2O

Ruby

Corundum (Al2O3 with Chromium trace impurities)

Large calcite crystal cluster

Calcite (calcium carbonate, CaCO₃)

Amygdaloidal Basalt

Basalt with secondary mineral infilling (SiO2/CO3)

Quartz Pebble

Silicon Dioxide (SiO2)

Polished smoky quartz pendant

Smoky quartz, silicon dioxide (SiO₂), colored by irradiation-related defects

Polished brown stone, likely smoky quartz or jasper

Tentatively quartz (SiO₂), possibly smoky quartz; exact identification requires testing

Chalcedony (Agate/Carnelian precursor)

Chalcedony (Silicon Dioxide, SiO2)

Apatite

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

Chalcopyrite in River Pebble (Pebble with Pyrite/Fool's Gold inclusions)

CuFeS2 in fine-grained igneous host rock (Basalt / Andesite)

Amygdaloidal Basalt

Vesicular Basalt with secondary mineral infilling (commonly Zeolite, Calcite, or Quartz)

Slickenside

Tectonic Fault Scarp Surface

Rough Emerald/Green Beryl

Beryl (Be3Al2(SiO3)6) with trace amounts of Chromium or Vanadium

Pegmatite (Granitic Pegmatite)

Pegmatite (Quartz + Potassium Feldspar + Mica)

Quartz (specifically Citrine or Yellow Quartz)

Silicon Dioxide (SiO2)

White Agate (Chalcedony)

Silicon Dioxide (SiO2)

Garnet Schist

Almandine Garnet in Mica Schist