Mineralological Specimen

Milky Quartz

Silicon Dioxide (SiO2)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Chrysocolla

Hydrated copper phyllosilicate mineral (Cu,Al)2H2Si2O5(OH)4·n(H2O)

Milky Quartz

Silicon Dioxide (SiO2)

Blue Lace Agate

Silicon Dioxide (SiO₂)

Banded Agate (specifically Botswana Agate or Water-line Agate)

Chalcedony (cryptocrystalline variety of Quartz), SiO2

Green Aventurine

Silicon Dioxide (Quartz) with inclusions of Fuchsite (K(Al,Cr)2AlSi3O10(OH)2)

Blue Lace Agate

Silicon Dioxide (SiO2)

Tektite (Indochinite)

Tektite (impactite), primarily high-silica glass (SiO2)

Amethyst Quartz

Amethyst (SiO2 with Iron impurities)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Crazy Lace Agate

Silicon Dioxide (SiO2) with impurities

Fuchsite in Quartz

K(Al,Cr)2(AlSi3O10)(OH)2 + SiO2

Moonstone

Orthoclase feldspar ((K,Na)AlSi3O8)

Amethyst

Silicon Dioxide with Iron impurities (SiO2)

Epidote (likely Unakite component or Epidosite)

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

Obsidian

Volcanic Glass (70-75% SiO2)

Pink Opal

Hydrated silicon dioxide (SiO2·nH2O) with inclusions

Celestine (or Celestite) on Matrix

Celestine (SrSO4)

Amethyst

Amethyst (Silicon Dioxide, SiO2)

Lapis Lazuli

Lapis Lazuli (Primary mineral: Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Jasper

Silicon dioxide (SiO2)

Dendritic Quartz Pebble

Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions

Moonstone (Orthoclase Feldspar)

(K,Na)AlSi3O8

Garden Quartz (Lodalite)

Silicon Dioxide (SiO2) with mineral inclusions

Citrine Quartz

SiO2 (Silicon Dioxide with Iron impurities)

Heliotrope (Bloodstone)

Silicon dioxide (SiO2) with inclusions

Tanzanite

Blue Zoisite (Ca2Al3(SiO4)3(OH))

Charoite

K(Ca,Na)2Si4O10(OH,F)·H2O

Peach Moonstone

Potassium Aluminum Silicate (KAlSi3O8); variety of Orthoclase Feldspar

Carnelian (a variety of Chalcedony)

SiO2 (Silicon Dioxide) primarily colored by iron oxide (Hematite)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide inclusions)

Strawberry Quartz (Hematoid Quartz)

Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)

Jasper

Jasper (Silicon Dioxide, SiO2)

Moss Agate

Chalcedony (Silicon Dioxide) with dendritic inclusions (SiO2)

Rose Quartz

Silicon Dioxide (SiO2)

Crazy Lace Agate

Cryptocrystalline Quartz (Silicon Dioxide, SiO2)

Star Sapphire

Corundum (Al2O3) with Rutile inclusions

Chrysocolla

Hydrated copper silicate (Cu,Al)2H2Si2O5(OH)4·n(H2O)

Tiffany Stone

Fluorite Opal (a complex mix of Fluorite, Opal, Calcite, Dolomite, Quartz, and Bertrandite)

Fuchsite Gneiss (Green Quartzite)

Chromium-rich Muscovite (KAl2(AlSi3O10)(OH)2 with Cr replacements)

Jasper (specifically Yellow/Red Jasper)

Silicon Dioxide (SiO2) with iron oxide inclusions