Sedimentary Or Igneous (Host Environment)

Quartz with Host Rock Matrix

Silicon Dioxide (SiO2)

Ruby

Corundum (Al2O3 with Chromium trace)

Rose Quartz attached to matrix

Silicon dioxide, SiO2

Milky Quartz

Silicon Dioxide (SiO2)

Polished yellow jasper or opaque chalcedony bead

Microcrystalline quartz (SiO₂), likely iron-oxide-stained jasper

Yellow Jasper

Silicon Dioxide (SiO2) with iron impurities

Massive Quartz with Host Rock

Silicon Dioxide (SiO2)

Quartz Vein in Sedimentary Rock

Silicon Dioxide (SiO2) with host Chert or Limestone

Quartz Geode Fragment

Silicon Dioxide (SiO2) in a Sedimentary Host

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Carnelian Agate

Silicon Dioxide (SiO2) with iron oxide inclusions

Likely raw mica-bearing mineral fragment

Possibly biotite mica or a biotite-rich metamorphic fragment; identification is limited by the dark, blurred image

Clear quartz crystal fragment

Quartz, silicon dioxide (SiO₂)

Quartz Pebble

Silicon Dioxide (SiO2)

Kunzite (variety of Spodumene)

Lithium Aluminum Silicate (LiAlSi2O6)

Quartz in Basalt (Xenocryst)

Silicon Dioxide (SiO2) in Mafic Igneous Volcanic Rock

Quartz Geode/Vug in Host Rock

SiO2 (Silicon Dioxide) in various host rocks

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Chert (Black Flint)

Microcrystalline Quartz (SiO2)

Quartz Vein Rock

Quartz (Silicon Dioxide, SiO2)

Quartz-bearing pegmatitic rock, likely granite/pegmatite

Feldspar–quartz pegmatite; chiefly K-feldspar, plagioclase, quartz, and possible mica

Red Jasper with Quartz veins

Jasper (Silicon Dioxide, SiO2) with macrocrystalline Quartz veins

Tumbled or naturally etched mica-rich mineral specimen, likely muscovite

Muscovite, KAl₂(AlSi₃O₁₀)(OH)₂; possibly phlogopite mica

Likely polished bronzite or serpentine-rich rock

Probable bronzite, an iron-bearing orthopyroxene (Mg,Fe)SiO₃; exact identification requires testing

Garnet

Almandine (Fe3Al2(SiO4)3)

Quartz Veined Siltstone

Siltstone with Quartz Intrusion (SiO2)

Turquoise and Hematite

Turquoise (CuAl6(PO4)4(OH)8·4H2O) and Hematite (Fe2O3)

Unakite Mushroom Carving

Altered Granite (Epidote, Pink Orthoclase Feldspar, and Quartz)

Quartz-rich Diorite

Diorite (Phaneritic intermediate igneous rock)

Milky Quartz with Iron Staining

Quartz (Silicon Dioxide - SiO2)

Chert (specifically Flint or Jasper variant)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Emerald (or possibly Green Glass / Slag)

Beryl (Be3Al2(SiO3)6)

Fluorite on Host Rock

Calcium Fluoride (CaF2)

Quartz (Smoky/Milky variety)

Silicon Dioxide (SiO2)

Glauconite (Sandstone or Shale)

Glauconite (K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2

Turquoise

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

Honey/orange calcite

Calcite (calcium carbonate, CaCO₃)

Tumbled amber-colored quartz or chalcedony

Microcrystalline quartz (SiO₂), possibly iron-stained chalcedony

Pyrite-bearing sulfide ore (likely pyrite with iron oxides)

Pyrite, FeS₂, possibly mixed with limonite/goethite and other sulfides