Crystal

Green fluorite rough specimen

Fluorite (calcium fluoride, CaF₂)

Green tourmaline (verdite-like rough)

Likely elbaite, Na(Li₁.₅Al₁.₅)Al₆(Si₆O₁₈)(BO₃)₃(OH)₄; identification from the photo is tentative

Clear quartz crystal fragment

Quartz (silicon dioxide, SiO₂)

Quartz Sand Grain / Micro Crystal

Silicon Dioxide (SiO2)

Raw quartz crystal (likely smoky or iron-stained quartz)

Quartz, silicon dioxide (SiO₂)

Clear Quartz (Crystal Quartz)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Tumbled amethyst

Quartz, purple variety; silicon dioxide (SiO₂), colored mainly by iron impurities and irradiation

Iron-stained quartz crystal cluster

Quartz (SiO₂), likely iron-oxide-stained; exact variety uncertain

Quartz Crystal on Matrix

Silicon Dioxide (SiO2)

Quartz Druze (on Matrix)

Silicon Dioxide (SiO2)

Clear Quartz Crystal

Silicon Dioxide (SiO2)

Clear Quartz Crystal

Silicon Dioxide (SiO2)

Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Black tourmaline (schorl) in matrix

Schorl, NaFe₃Al₆(BO₃)₃Si₆O₁₈(OH)₄

Polished rose quartz

Quartz, silicon dioxide (SiO₂), pink variety

Tumbled sodalite

Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂

Smoky quartz crystal (probable)

Quartz, silicon dioxide (SiO₂), likely iron-colored smoky quartz

Obsidian

Obsidian

Amethyst

Amethyst (Varietal of Quartz), SiO2 with traces of Iron (Fe3+)

Botryoidal calcite specimen

Calcite, CaCO₃, with possible dolomite or other carbonate matrix

Fluorescent calcite (probable)

Calcite, calcium carbonate (CaCO₃)

Garnet crystals

Garnet-group silicates, likely almandine (Fe₃Al₂Si₃O₁₂)

Tumbled smoky quartz, possibly morion

Quartz (silicon dioxide, SiO₂), likely radiation-darkened smoky quartz

Smoky quartz crystal

Quartz (SiO₂), likely smoky quartz

Clear quartz crystal

Quartz (silicon dioxide, SiO₂)

Dyed Quartz Crystal

Silicon Dioxide (SiO2) with artificial pigment

Quartz Crystal Fragment

Silicon Dioxide (SiO2)

Black tourmaline (schorl)

Schorl, NaFe₃Al₆(BO₃)₃Si₆O₁₈(OH)₄

Likely quartz crystal with iron-oxide staining

Quartz (SiO₂), possibly included or coated with limonite/goethite

Green and purple fluorite

Fluorite (calcium fluoride, CaF₂)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Polished amethyst crystal point

Amethyst, purple quartz (SiO₂)

Black tourmaline (schorl) crystal fragments

Schorl, NaFe²⁺₃Al₆(BO₃)₃Si₆O₁₈(OH)₄

Quartz crystal fragment (likely milky/included quartz)

Quartz, silicon dioxide (SiO₂)

Quartz (Smoky/Rock Crystal)

Silicon Dioxide (SiO2)

Orange-yellow calcite crystal

Calcite (CaCO₃), likely honey/orange calcite

Quartz Crystal Cluster on Matrix

Silicon Dioxide (SiO2)

Tumbled yellow chalcedony (possibly citrine or pale agate)

Chalcedony, microcrystalline quartz (SiO₂); exact variety cannot be confirmed visually

Likely banded chert (flint) fragment

Microcrystalline quartz, SiO₂; visual identification is uncertain from the image alone

Tumbled milky chalcedony (likely common opal or quartz-rich chalcedony)

Chalcedony, microcrystalline SiO₂; identification is uncertain from the photo