Metamorphic Or Igneous Alteration

Hematite

Iron Oxide (Fe2O3)

Hematite

Iron(III) oxide (Fe2O3)

Aventurine

Quartz (SiO2) with Fuchsite inclusions

Emerald

Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities

Milky Quartz

Silicon Dioxide (SiO2)

Unidentified pink-and-green mineral-bearing rock

Not reliably identifiable from the image; possible pink feldspar with green epidote or another green mineral

Epidotite (Unakite-related Epidote)

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

Specular Hematite (Specularite)

Iron(III) oxide (Fe2O3)

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide (Limonite/Hematite)

Ruby

Corundum (Aluminum Oxide, Al2O3)

Quartz with Muscovite Mica

Silicon Dioxide (SiO2) with Potassium aluminum silicate hydroxide fluoride [KAl2(AlSi3O10)(F,OH)2]

Emerald

Beryl (Be3Al2(SiO3)6)

Quartz Vein / Quartz Matrix

Silicon Dioxide (SiO2)

Rounded gray-green pebble, likely basaltic or metamorphic

Indeterminate mafic rock; possibly basalt, diabase, or greenstone

Serpentine (Serpentinite)

Serpentinite / Serpentine Group (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4

Greenschist (Greenstone)

Chlorite schist (primarily Chlorite-Epidote-Actinolite-Albite)

Greenstone (Epidosite/Altered Diorite)

Metabasalt or Meta-andesite / Epidotized Diorite

Nephrite Jade

Ca2(Mg,Fe)5Si8O22(OH)2

Nephrite Jade

Tremolite-Actinolite solid solution, Ca2(Mg,Fe)5Si8O22(OH)2

Epidote

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

Native Gold (in the form of jewelry)

Gold (Au)

Epidote

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

Morganite (Pink Beryl)

Beryllium aluminum silicate Be3Al2(SiO3)6

Blue Sapphire (in a faceted jewelry setting)

Corundum (Al2O3) with trace Iron and Titanium

Sapphire Rough (Corundum)

Corundum (Aluminum Oxide, Al2O3)

Dumortierite in Quartz

Dumortierite (Al6O3(BO3)(SiO4)3) with Quartz (SiO2)

Quartz Pebble with Epidote / Chlorite Inclusions

Silicon Dioxide (SiO2) with Epidote/Chlorite inclusions

Likely polished bronzite or serpentine-rich rock

Probable bronzite, an iron-bearing orthopyroxene (Mg,Fe)SiO₃; exact identification requires testing

Quartz with impurities or Host Rock

SiO2 (Silicon Dioxide) with mixed silicates

Milky Quartz

Silicon Dioxide (SiO2)

Epidote

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

Sapphire

Corundum (Al2O3)

Epidote with Unakite characteristics

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

Greenstone / altered mafic rock

Likely serpentinite or chlorite-rich metabasalt; exact identification requires testing

Nephrite Jade

Ca2(Mg, Fe)5Si8O22(OH)2 (Tremolite-Actinolite series)

Nephrite Jade

Ca2(Mg, Fe)5Si8O22(OH)2 (Tremolite-Actinolite series)

Gold-Bearing Quartz Ore

Crystalline Silicon Dioxide (SiO2) with Trace Aurum (Au)

Sodalite

Sodalite (Na4Al3Si3O12Cl)

Greenstone / Serpentinite

Serpentine-group / Altered Mafic Rock

Unidentified small rock fragment

Likely quartz-rich material; exact identification is indeterminate from the image

Green Quartz (Prasiolite)

Silicon Dioxide (SiO2)

Ruby (set in a gold pendant)

Ruby (Variety of Corundum, Al2O3)