Mineral Side Rock

Iron Meteorite (likely Chondrite or weathered Iron-Nickel)

Meteorite (Fe-Ni alloy & silicates)

Sandstone Pebble

Sandstone (Siliciclastic Sedimentary Rock)

Note: Item is not a geological specimen

Polyester mesh and Ethylene-vinyl acetate (EVA) polymer

Epidote

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

Granite

Granite (phaneitic intrusive igneous rock)

Epidote

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

Quartz Druze (Crystalline Quartz)

Silicon Dioxide (SiO2)

Weathered fossil shell fragment

Likely a fossilized bivalve or gastropod fragment; exact taxon cannot be determined from one view

Epidote

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

Quartz-rich rock fragment (tentative)

Quartz, silicon dioxide (SiO₂), possibly in a weathered host rock

Quartz crystal fragment

Quartz (silicon dioxide, SiO₂)

Sandstone

Arenite (primarily Quartz-based Sandstone)

Sandstone (Micaceous)

Arenite (primarily SiO2 with Phyllosilicates)

Likely milky quartz

Quartz (silicon dioxide, SiO₂), possibly quartz-rich rock or calcite

Clear Quartz Crystal

Silicon Dioxide (SiO2)

Raw quartz (likely milky or smoky quartz)

Quartz, SiO₂

Epidote

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

Quartz Crystal Point

Silicon Dioxide (SiO2)

Milky quartz-rich rock

Quartz, SiO₂; possibly quartzite or massive vein quartz

Milky Quartz

Silicon Dioxide (SiO2)

Quartz crystal cluster with possible chlorite inclusions

Quartz, silicon dioxide (SiO₂), likely with minor chlorite or iron-oxide staining

Clear quartz (rock crystal)

Quartz, silicon dioxide (SiO₂)

Garnet Schist

Almandine-Garnet Schist

Epidote

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

Epidotite (Unakite variety)

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

Epidote

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

Epidote

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

Druzy quartz geode slice

Quartz, silicon dioxide (SiO₂), commonly lining a chalcedony- or quartz-rich geode

Epidote in Matrix

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

Black polished stone or mineral fragment

Unidentified opaque dark mineral; possibilities include black tourmaline (schorl), obsidian, or hematite

Amethyst

Amethyst (SiO2)

Garnet in Quartzite

Garnet-bearing Quartzite (SiO2 + X3Y2(SiO4)3)

Quartz Crystal Cluster on Matrix

Silicon Dioxide (SiO2)

Epidote

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

Epidote

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

Bivalve seashell (likely cockle or ark clam)

Calcareous shell composed chiefly of aragonite (CaCO₃); exact species cannot be determined confidently from the image

Epidote

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

Fossiliferous limestone with a possible shell or trace fossil

Calcitic limestone (mostly CaCO₃), fossil identity indeterminate from the image

Rough Garnet (Almandine)

Almandine Garnet (Fe3Al2(SiO4)3)

Clear Quartz

Silicon Dioxide (SiO2)

Epidote (Unakite-related)

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

Quartz-rich translucent fragment

Quartz, silicon dioxide (SiO₂), possibly chalcedony or vein quartz