Mineral Side Rock

Pyrite Cubes in Matrix

Iron Disulfide (FeS2) in Host Matrix

Epidote

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

Epidote

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

Epidote

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

Basalt with Quartz Vein and Weathering Crust

Amygdaloidal or Porphyritic Basalt

Shiva Eye Shell (Operculum)

Calcium Carbonate (Aragonite), CaCO3

Epidote

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

Epidote in Basalt

Epidotized Basalt (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH) in Mafic Igneous Host)

Epidote

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

Quartzite river pebble

Quartzite (SiO2)

Crinoid Fossil Stem Segment

Class Crinoidea (Echinodermata)

Epidosite (Epidote-rich rock)

Epidotalite (primarily Ca2(Al2Fe3+)(SiO4)(Si2O7)O(OH))

Epidote

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

Epidote

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

Epidote

Epidote - Ca2(Al2,Fe3+)3(SiO4)3(OH)

Iron Meteorite (likely Chondrite or weathered Iron-Nickel)

Meteorite (Fe-Ni alloy & silicates)

Herkimer Diamond

Quartz (Silicon Dioxide, SiO2)

Epidosite (Epidote-rich rock)

Epidosite (consisting primarily of Epidote: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH))

Granite

Granite (phaneitic intrusive igneous rock)

Epidotite (Unakite variety)

Epidotized Granite (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))

Note: Item is not a geological specimen

Polyester mesh and Ethylene-vinyl acetate (EVA) polymer

Quartz Druze (Crystalline Quartz)

Silicon Dioxide (SiO2)

Epidote

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

Epidote

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

Epidote

Epidote Group (e.g., Clinozoisite, Epidote, Piemontite), Epidote formula: Ca2(Al,Fe)3(SiO4)3(OH)

Clear Quartz Crystal

Silicon Dioxide (SiO2)

Sandstone (Micaceous)

Arenite (primarily SiO2 with Phyllosilicates)

Epidote in Matrix

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

Epidote

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

Epidote

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

Epidote (Unakite-related)

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

Garnet Schist

Almandine-Garnet Schist

Quartz Crystal Point

Silicon Dioxide (SiO2)

Epidote

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

Epidote (likely Unakite component or Epidosite)

Epidote (Ca2(Al2Fe)(SiO4)(Si2O7)O(OH))

Brachiopod Fossil in Shale

Phylum Brachiopoda (often species of Order Spiriferida or Rhynchonellida)

Quartz Crystal Cluster on Matrix

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Epidote

Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))

Epidote

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Amethyst

Amethyst (SiO2)