Sedimentary Or Igneous (Host Environment)

Rough Emerald

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

Quartzite River Cobble

Quartzite (SiO2)

Jasper with Epidote Vein

Silicon Dioxide (SiO2) with Calcium Aluminum Iron Silicate (Ca2(Al,Fe)3(SiO4)3(OH))

Milky Quartz Vein with Matrix

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Basalt-Amugydule (Amygdaloidal Basalt)

Aphanitic Mafic Igneous Rock with Vesicle Infillings

Quartz (Chalcedony/Agate nodule)

Silicon dioxide (SiO2)

Chert (Common Opal/Chalcedony mixture)

Silicon Dioxide (SiO2)

Jadeite (Jade)

NaAlSi2O6 (Sodium Aluminum Silicate)

Turquoise

Turquoise (Hydrated phosphate of copper and aluminium) CuAl6(PO4)4(OH)8·4H2O

Blue Topaz (specifically London Blue or Swiss Blue based on color saturation)

Al2SiO4(F,OH)2 (Aluminum Silicate Fluoride Hydroxide)

Granitic Pegmatite

Granite Pegmatite (coarse-grained intrusive igneous rock)

Quartz

Silicon Dioxide (SiO2)

Garnet (likely Almandine or Pyrope)

Garnet (Group Name), Fe3Al2(SiO4)3 or Mg3Al2(SiO4)3

Porphyry (Flower Stone)

Porphyritic Basalt or Andesite

Basalt with Quartz/Quartzite Veins

Aphanitic Mafic Volcanic Rock with Siliceous Infillings

Quartz Vein in Hematitic Siltstone

Hydrothermal Quartz (SiO2) in Ferriferous Matrix

Blue Apatite

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

Blue Apatite

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

Yellow Apatite

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

Clear Quartz (Faceted) or Cubic Zirconia / Glass imitation

SiO2 (if Quartz), ZrO2 (if Cubic Zirconia)

Copper-bearing Quartz Vein in Host Rock

Quartz with Malachite/Chrysocolla staining

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Basalt with Quartz Vein

Aphanitic Mafic Igneous Rock with Silicon Dioxide (SiO2) intrusion

Chert (Jasper)

Silicon Dioxide (SiO2)

Argillite / Mudstone

Argillaceous sedimentary rock

Shale

Fissile Clay-dominant Mudrock (SiO2, Al2O3, K2O, Na2O, CaO, MgO)

Uncertain polished mineral specimen

Indeterminate; possibly quartz or feldspar with iron-oxide staining

Large calcite crystal cluster

Calcite (calcium carbonate, CaCO₃)

Quartz Geode in Sedimentary Host Rock

Silicon Dioxide (SiO2) in Carbonate Matrix

Siderite Concretion in Shale

Iron carbonate (FeCO3) in Mudstone/Shale matrix

Milky Quartz with Chlorite Schist Inclusions

Quartz (SiO2) with Chlorite Group silicates (typically (Mg,Fe)3(Si,Al)4O10(OH)2)

Epidote

Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz Crystal Matrix

Silicon Dioxide (SiO2)

Sandstone Concretion

Sedimentary Clastic Rock (Silicate-rich)

Septarian Nodule Segment (Turtle Stone)

Septarian Concretion (CaCO3 with Siderite or Calcite infill)

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Chert (often called Flint when dark)

Sedimentary cryptocrystalline quartz (SiO2)

Banded Chert (with Quartz Vein)

Microcrystalline Silica (SiO2)

Milky Quartz with Matrix

Silicon Dioxide (SiO2)