Mineral With Metamorphic Or Sedimentary Host

Tumbled orange chalcedony (probable carnelian)

Cryptocrystalline quartz, SiO₂; reddish-orange variety commonly called carnelian

Gneiss with a polished reddish-brown stone

Banded granitoid gneiss; the foreground pebble may be jasper or iron-rich quartzite

Quartz Druzy Geode Fragment

Silicon Dioxide (SiO2)

Green Aventurine (or Xiuyan Jade / Serpentine)

Silicon Dioxide (SiO2) with Fuchsite inclusions or Magnesium Silicate

Quartz Vein with Host Rock (Greywacke/Siltstone)

Silicon Dioxide (SiO2) within Clastic Sedimentary/Metamorphic Matrix

Pink Feldspar / Rhodochrosite (Tumbled Pink Quartzite)

SiO2 (Quartz) / KAlSi3O8 (Potassium Feldspar)

Jasper (Iron-rich)

Silicon Dioxide (SiO2) with Fe2O3 (Hematite) impurities

Quartz Veined Siltstone

Siltstone with Quartz (SiO2) intrusion

Serpentinite

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

Emerald in Matrix (Quartz/Schist)

Beryl (Be₃Al₂Si₆O₁₈) with Chromium/Vanadium impurities

Quartz vein in dark metamorphic rock

Likely quartz-rich vein cutting a biotite- or amphibole-rich metamorphic host; exact host rock cannot be confirmed from the image

Quartz with Calcite / Geode Fragment

Silicon Dioxide (SiO2) / Calcium Carbonate (CaCO3)

Gold-bearing sulfide ore (tentative)

Native gold, likely with pyrite/chalcopyrite in quartz or altered rock

Quartz Druze on Matrix

Silicon Dioxide (SiO2)

Green Aventurine (Carved)

Silicon Dioxide (Quartz variant) with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O(OH)2)

Quartz vein in Schist

Crystalline Silicon Dioxide (SiO2) in Metamorphic Host

Green Aventurine

Quartz (Silicon Dioxide, SiO2) with fuchsite inclusions

Quartz fragment (Pebble)

Silicon Dioxide (SiO2)

Concretion

Sedimentary Concretion

Prehnite with Epidote and Quartz

Prehnite (Ca2Al(AlSi3O10)(OH)2)

Almandine Garnet

Iron aluminum silicate (Fe3Al2(SiO4)3)

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) with host rock (often Schist or Basalt)

Red Jasper

Microcrystalline Quartz (SiO2)

Quartz geode/druse, likely chalcedony matrix

Quartz, silicon dioxide (SiO₂), with possible microcrystalline chalcedony

Chrome Diopside

Magnesium Calcium Silicate (MgCaSi2O6) containing Chromium impurities

Pyrite Geode (Sparkling Druzy)

Iron Sulfide (FeS2) in Sedimentary Nodule

Quartzite with Epidote/Chlorite Inclusion

Metamorphic Quartzite (SiO2 with accessory silicate minerals)

Banded calcite (likely cave deposit or vein fragment)

Calcite, CaCO₃

Yellow Jasper

Silica (Silicon Dioxide, SiO2) with iron inclusions

Raw quartz-rich rock, likely milky quartz

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

Garnet in Schist or Pegmatite

Almandine Garnet (Fe3Al2(SiO4)3) in host rock

Beryl (likely Emerald or Aquamarine in matrix)

Beryllium aluminum silicate (Be3Al2Si6O18)

Orange calcite fragment

Calcite (CaCO₃), likely iron-stained or orange-colored calcite

Garnet-bearing metamorphic rock, likely garnet gneiss or garnet amphibolite

Garnet-bearing gneiss; red crystals likely almandine garnet, Fe₃Al₂(SiO₄)₃

Emerald in Matrix

Beryl (Be3Al2Si6O18)

Likely quartz-rich rock fragments

Uncertain; probable quartz with iron-oxide staining, possibly mica-bearing metamorphic rock

Emerald

Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)

Quartz Pebble (Chalcedony / Milky Quartz)

Silicon Dioxide (SiO2)

Likely milky quartz fragment

Quartz (silicon dioxide, SiO₂)

Likely potassium feldspar (orthoclase) fragment

Orthoclase, KAlSi₃O₈ (tentative identification)

Quartz Vein Rock

Silicon Dioxide (SiO2)