Mineral With Metamorphic Or Igneous Host

Quartzite with Mafic Inclusion

Metamorphic Quartzite / Mafic Host Rock

Pegmatitic pink feldspar–quartz rock

Granitic pegmatite; chiefly microcline/orthoclase feldspar (KAlSi₃O₈), quartz (SiO₂), and minor mica

Magnetite

Iron(II,III) oxide (Fe3O4)

Quartz (on matrix)

Quartz (Silicon Dioxide, SiO₂)

Tumbled blue-green chrysocolla (likely chrysocolla with quartz)

Chrysocolla, hydrated copper aluminum silicate; commonly intergrown with quartz, Cu₂H₂Si₂O₅(OH)₄

Copper-bearing Basalt with Epidote and Quartz

Native copper in basalt amygdaloidal matrix

Granite Pebble with Quartz Vein

Granite (Plutonic Igneous Rock) with Quartz (SiO2)

Weathered quartz-rich rock, possibly milky quartz or quartz-bearing granite

Quartz (SiO₂), potentially with feldspar and iron-oxide staining

Serpentinite

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

Carnelian

Carnelian (Microcrystalline Quartz, SiO2 with Fe2O3 impurities)

Banded Agate (Polished Slice)

Chalcedony (cryptocrystalline Quartz), SiO2

Dyed Agate

Microcrystalline Quartz (SiO2) with artificial pigment

Raw Agate (Chalcedony Nodule)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Pegmatite (likely Granitic Pegmatite)

Pegmatite (a coarse-grained igneous rock, often with granitic composition)

Amygdaloidal Basalt

Vesicular and Amygdaloidal Basalt

Bronzite

MgSiO3 (Enstatite with 10-30% FeSiO3 in solid solution)

Milky Quartz (Tumbled Pebble)

Silicon Dioxide (SiO2)

Agate (or Chalcedony with Moss/Jasper Inclusions)

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Blue Apatite

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

Magnetite (Iron Ore)

Magnetite (Fe3O4)

Green Aventurine in Host Rock

Quartz (SiO2) with Fuchsite inclusions

Iron-rich quartzite or silicified ironstone

Quartz (SiO₂) with iron oxides/hydroxides, likely limonite/goethite and possibly hematite

Serpentinite

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

Quartz Veined Siltstone

Siltstone with Quartz (SiO2) intrusion

Blue Apatite

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

Iron-stained quartz vein rock

Milky quartz (SiO₂) with limonite/goethite iron oxides, possibly in altered host rock

Quartz Vein with Host Rock (Greywacke/Siltstone)

Silicon Dioxide (SiO2) within Clastic Sedimentary/Metamorphic Matrix

Milky quartz-rich rock

Quartz (SiO₂), likely massive milky quartz with minor iron-oxide staining and attached host material

Granite with Quartz Vein

Phaneritic Felsic Igneous Rock (composed of Quartz [SiO2], Feldspar, and Mica)

Raw quartz-rich rock, likely milky quartz

Quartz (silicon dioxide, SiO₂), possibly quartzite or a quartz-bearing host rock

Quartz Vein Pebble

Silicon dioxide (SiO2)

Blue Apatite

Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)

Amethyst

Amethyst (Silicon Dioxide with iron impurities), SiO2

Granodiorite

Granodiorite (Quartz + Plagioclase + Alkali Feldspar + Biotite/Hornblende)

Ocellar Rhyolite

Rhyolite (featuring orbicular/ocellar quartz and feldspar textures)

Milky quartz (likely iron-stained quartz)

Quartz — silicon dioxide (SiO₂)

Banded Quartz with Host Rock / Quartz Vein Pebble

Silicon Dioxide (SiO2) in Metamorphic Matrix

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) in Slate/Schist

Yellow Apatite

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

Tumbled citrine or iron-stained quartz

Quartz (SiO₂), likely iron-oxide-stained or natural citrine