Mineral

Chrysocolla

Hydrated copper phyllosilicate (Cu,Al)2H2Si2O5(OH)4 nH2O

Turquoise in Matrix

Hydrated phosphate of copper and aluminum (CuAl6(PO4)4(OH)8·4H2O)

Limonite (Ironstone)

Hydrated Iron Oxide (FeO(OH)·nH2O)

Gneiss

Foliated Metamorphic Rock (Gneiss)

Epidosite

Epidosite (Metasomatic rock consisting mainly of Epidote and Quartz)

Granite

Granite (a broadly defined plutonic igneous rock, often more specifically classified as quartz monzonite or granodiorite based on precise mineral percentages)

Glaucophane-bearing Schist (Blueschist)

Blueschist (Glaucophane-Lawsonite Schist)

Pink Granite

Granite (Phaneritic Quartz-Feldspar Rock)

Gneiss

Gneiss

Not a geological specimen

N/A (man-made object)

Gneiss (with Quartzite and Mica)

Gneiss

Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Banded Gneiss

Gneiss (High-grade regional metamorphic rock)

Diorite

Phaneritic plutonic rock (dominated by plagioclase feldspar and hornblende)

Banded Gneiss (River Cobble)

Gneiss (a high-grade metamorphic rock)

Hemimorphite on Limonite Gossan

Hemimorphite (Zn4Si2O7(OH)2·H2O) on Limonite matrix

Fluorite

Calcium Fluoride (CaF2)

Basalt with Epidote (Greenstone)

Amygdaloidal Basalt (Ca2(Al, Fe)3(SiO4)3(OH) inclusions)

Quartzite

Quartzite (Primary mineral: Silicon Dioxide, SiO₂)

Limonite (Iron Ore)

Limonite (Iron oxide-hydroxide mixture, FeO(OH)·nH2O)

Ferruginous Sandstone (Gozzanous)

SiO2 (Quartz) with FeO(OH) (Goethite) or Fe2O3 (Hematite) coating

Limonite / Ironstone Nodule

Limonite (Hydrated iron(III) oxide-hydroxide), FeO(OH)·nH2O

Lapis Lazuli (Tumbled Specimen)

Lapis Lazuli (Aggregate rock containing Lazurite: (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2)

Turquoise

Turquoise (CuAl6(PO4)4(OH)8·4H2O)

Quartz on Sandstone

Silicon Dioxide (SiO2) in Lithic Sandstone

Orthoclase Feldspar

Orthoclase (KAlSi3O8)

Turquoise

Hydrated phosphate of copper and aluminum, CuAl6(PO4)4(OH)8·4H2O

Rhodochrosite

Manganese Carbonate (MnCO3)

Rhodonite

Manganese Silicate (Mn,Fe,Mg,Ca)SiO3

Kaolinite (Chalky Clay)

Kaolinite (Al2Si2O5(OH)4)

Turquoise

Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]

Chrysocolla and Azurite in Matrix

Hydrated copper phyllosilicate (Chrysocolla - Cu2H2Si2O5(OH)4) and Copper carbonate (Azurite - Cu3(CO3)2(OH)2)

Limonite (Iron Ore)

Goethite and related iron hydroxides (FeO(OH)·nH2O)

Ironstone Concretion (Limonite/Goethite)

Ferruginous Sandstone or Limonite (FeO(OH)·nH2O)

Amygdaloidal Basalt

Basalt with Secondary Mineral Infillings

Hypersthene

(Mg,Fe)SiO3 - Enstatite-Ferrosilite series

Man-made Jewelry Charm (Enameled Metal)

Not a natural mineral; composed of base metal alloy (likely zinc or brass) and epoxy resin/enamel.

Milky Quartz with Mineral Inclusions

Quartz (Silicon Dioxide - SiO2)

Turquoise (with Hematite)

CuAl6(PO4)4(OH)8·4H2O

Limonite (Ironstone)

Hydrous ferric oxides (FeO(OH)·nH2O)

Sandstone (with banding)

Arenite (primarily SiO2)

Cubic Zirconia (Faceted)

Zirconium dioxide (ZrO2)