Mineral Side Rock

Clear Quartz (Rock Crystal)

Quartz (Silicon Dioxide - SiO2)

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Green cabochon gemstone pendant, likely turquoise or dyed green turquoise

Probably turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O; exact identification requires testing

Almandine Garnet in Matrix

Almandine (Fe3Al2(SiO4)3)

Sand Tiger Shark Tooth

Carcharias taurus

Green tourmaline crystal (likely elbaite)

Elbaite tourmaline, a complex borosilicate: Na(Li,Al)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄

Clear quartz crystal

Quartz (silicon dioxide, SiO₂)

Quartz-rich rock, likely milky quartz or quartzite

Quartz (SiO₂), possibly quartzite with minor iron-oxide inclusions

Epidote (likely Pistacite in Epidosite rock)

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

Epidote

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

Smoky Quartz (with Druzy/Polished Edge)

Smoky Quartz (Silicon Dioxide, SiO2)

Likely black tourmaline (schorl) crystal

Schorl, a black iron-rich tourmaline; approximate formula NaFe²⁺₃Al₆(BO₃)₃Si₆O₁₈(OH)₄

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Quartz-rich mineral specimen, possibly druzy quartz

Quartz (SiO₂), possibly with carbonate or feldspar matrix

Amethyst Geode (Carved)

Amethyst (Violet Crystalline Quartz - SiO2)

Milky Quartz (Crystal Cluster)

Silicon Dioxide (SiO2) - Quartz Variety

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Amethyst

Amethyst (Silicon Dioxide - SiO2 with impurities of iron)

Amethyst (Pale/Lavender variety)

Silicon Dioxide (SiO2)

Amethyst

Amethyst (Silicon Dioxide, SiO2)

Clear Quartz

Silicon Dioxide (SiO2) / Rock Crystal

Likely rough quartz crystal

Quartz (silicon dioxide, SiO₂)

Quartz Crystal Cluster

Silicon Dioxide (SiO2)

Amethyst

Amethyst (Silicon Dioxide with Iron impurities, SiO2)

Quartz with Epidote

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

Quartz Crystal Cluster

Quartz (Silicon Dioxide, SiO2)

Quartz Crystal Cluster

Silicon Dioxide (SiO2)

Amethyst geode or druzy quartz specimen

Quartz, SiO₂; purple coloration is typically caused by iron-related defects and irradiation

Quartz crystal with associated mica or feldspar

Quartz (SiO₂), with possible muscovite mica and feldspar inclusions

Quartz (Clear / Rock Crystal)

Silicon Dioxide (SiO2)

Polished blue banded agate cabochon/ornamental slab

Microcrystalline quartz (chalcedony), SiO₂, with blue coloring or inclusions

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Clear Quartz (Double Terminated)

Silicon Dioxide (SiO2)

Agate (specifically, a slice of a Blue Lace or Chalcedony Agate nodule)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Weathered quartz-rich rock, possibly milky quartz or quartz-bearing granite

Quartz (SiO₂), potentially with feldspar and iron-oxide staining

Carnelian

Carnelian (SiO2 with iron oxide impurities)

Likely black tourmaline (schorl)

Schorl, black tourmaline; NaFe²⁺₃Al₆(BO₃)₃Si₆O₁₈(OH)₄

Amethyst Quartz

Amethyst (SiO2 with Iron impurities)

Quartz (Double-Terminated)

Silicon Dioxide (SiO2)

Druzy quartz-bearing rock

Quartz, SiO₂, as a druse coating or quartz-rich vein material

Smoky quartz crystal point

Quartz, silicon dioxide (SiO₂), colored smoky by irradiation-related defects

Quartz geode with drusy quartz crystals

Quartz, silicon dioxide (SiO₂), commonly colorless to milky crystalline quartz