Mineral With Metamorphic Or Igneous Host

Quartz Vein in Greenstone

Metamorphic rock with quartz vein (SiO2 / mixed silicates)

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Quartz Veined Rock (Likely Graywacke or Quartzite)

Silicon Dioxide (SiO2) veins in Metasedimentary matrix

Quartz (Vein Quartz)

Silicon Dioxide (SiO2)

Quartz-veined metamorphic rock, likely quartzite or schist

Quartz-rich metamorphic rock with a milky-quartz vein; exact host rock is indeterminate from the photo

Veined Pebble (Quartz/Calcite Veined Metamorphic/Sedimentary Rock)

Quartz / Calcite Veined Fault Breccia or Metamorphic Pebble

Green Aventurine and Clear Quartz

Green Aventurine (Silicon Dioxide - SiO2 with Fuchsite inclusions); Clear Quartz (Silicon Dioxide - SiO2)

Prase Quartz on Feldspar

Quartz (Silicon Dioxide, SiO2) with Hedenbergite inclusions on Potassium Feldspar (KAlSi3O8)

Pegmatitic mica-rich granite

Granitic pegmatite, composed mainly of quartz, feldspar, and biotite/muscovite mica

Quartz-bearing pegmatitic rock, likely granite/pegmatite

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

Likely milky quartz

Quartz (silicon dioxide, SiO₂)

Likely quartz-bearing mineral aggregate

Quartz (SiO₂), possibly mixed with mica or feldspar

Quartz with Fuchsite (or Chlorite)

SiO2 (Silicon Dioxide) with K(Al,Cr)2(AlSi3O10)(OH)2 (Fuchsite)

Chalcopyrite-bearing metamorphic rock (possibly bornite/chalcopyrite ore)

Likely quartz–sulfide rock containing chalcopyrite (CuFeS₂); identification from the image is tentative

Quartz on Matrix

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Charoite

Charoite (Hydrated potassium sodium calcium barium strontium silicate hydroxyfluoride)

Epidote (Unakite-related)

Epidote (Ca2(Al,Fe)3(SiO4)3(OH))

Likely quartz-rich rock or mineral fragment

Quartz (SiO₂), possibly in a pegmatitic or granitic matrix

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Black Star Diopside

Diopside (CaMgSi2O6) with Magnetite inclusions

Turquoise

Turquoise - CuAl6(PO4)4(OH)8·4H2O

Milky Quartz Vein with Matrix

Silicon Dioxide (SiO2)

Emerald in Matrix

Beryl (Be3Al2Si6O18) containing Chromium/Vanadium impurities

Pyrite-bearing Rock / Pyrite Ore

Iron Sulfide (FeS2) in host rock matrix

Milky Quartz

Silicon Dioxide (SiO2)

Epidote

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

Common Opal

Hydrated Amorphous Silica (SiO2·nH2O)

Polished labradorite pendant

Labradorite, a plagioclase feldspar in the albite–anorthite series, approximately (Ca,Na)(Al,Si)₄O₈

Chalcedony (Agate)

Silicon Dioxide (SiO2)

Milky quartz vein fragment

Quartz (SiO₂), likely massive or vein quartz with minor iron-oxide/clay inclusions

Weathered gold-bearing quartz vein fragment

Quartz (SiO₂) with probable iron oxides and sulfide/mineral inclusions

Pegmatitic granite specimen

Granitic pegmatite, chiefly quartz (SiO₂), feldspar, and mica

Mica-rich pegmatite

Granitic pegmatite composed mainly of muscovite mica, quartz, and feldspar

Porphyry (Flower Stone)

Porphyritic Basalt or Andesite

Serpentinite

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

Carnelian Agate

Silicon Dioxide (SiO2) - variety of Chalcedony

Quartz vein rock

Milky quartz (SiO₂) in altered host rock, likely quartz-bearing hydrothermal breccia

Emerald in Matrix

Beryl (Be3Al2Si6O18) with trace amounts of Chromium/Vanadium

Amethyst Quartz

Silicon Dioxide (SiO2) with iron impurities

Milky quartz vein fragment

Quartz (silicon dioxide, SiO₂), massive/microcrystalline variety

Emerald (Tumbled Beryl)

Beryllium Aluminum Silicate (Be3Al2Si6O18) with Chromium/Vanadium impurities