Mineral

Kidney Stone (Urolith / Calcium Oxalate Stone)

Calcium Oxalate Monohydrate (Whewellite) / Calcium Oxalate Dihydrate (Weddellite)

Small brown mineral or rock fragment (not identifiable from the image)

Undetermined; the specimen is too small and lacks visible diagnostic features for reliable identification

Small brown mineral or rock fragment

Undetermined; the image lacks enough detail for a reliable identification

Fuchsite

Chromium-rich Muscovite Mica

Limonite Geode / Ironstone Concretion

Hydrated Iron Oxide (FeO(OH)·nH2O)

Azurite with Malachite

Azurite: Cu3(CO3)2(OH)2 / Malachite: Cu2CO3(OH)2

Epidote

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

Azurite in Matrix

Azurite (Cu3(CO3)2(OH)2)

Quartz-rich hydrothermal mineral specimen, possibly vanadinite-bearing matrix

Quartz (SiO₂) with unidentified red-brown accessory minerals; exact species requires testing

Weathered garnet-bearing gneiss (likely)

Garnet-bearing gneiss; exact mineral identification is uncertain from the photograph

Granite pebble

Granite, a coarse-grained felsic intrusive igneous rock composed mainly of quartz, feldspar, and mica

Olivine (Peridot)

Magnesium Iron Silicate (Mg,Fe)2SiO4

Quartz-rich pegmatite fragment

Granite/pegmatite; chiefly quartz (SiO₂) and feldspar, with possible biotite or tourmaline

Limonite / Goethite Ironstone

FeO(OH)·nH2O (Hydrous iron oxide)

Banded Sandstone (Water-worn Pebble)

Arenite with mineral banding

Fossil brachiopod shell

Brachiopoda; exact genus and species cannot be determined from the image

Pyrite

Iron Disulfide (FeS2)

Gypsum (Selenite sand)

Calcium sulfate dihydrate (CaSO4·2H2O)

Fluorite on Host Rock

Calcium Fluoride (CaF2)

Pyrite

Iron Pyrite (FeS2)

Pyrite

Iron Sulfide (FeS2)

Eudialyte

Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2

Chrysocolla-bearing copper ore

Primarily chrysocolla, a hydrated copper silicate (approx. Cu₂−xAlx(H₂−xSi₂O₅)(OH)₄·nH₂O); exact identification is uncertain from the image.

Likely amphibolite

Amphibolite, composed chiefly of hornblende (amphibole) and plagioclase feldspar

Tumbled amethyst (likely)

Quartz, SiO₂; purple variety known as amethyst

Quartz (Smoky/Brown variety)

Silicon dioxide (SiO2)

Polished picture jasper (likely)

Silica-rich microcrystalline quartz, SiO₂, with iron-oxide and other mineral inclusions

Rounded granite cobble

Granite, a coarse-grained felsic intrusive igneous rock

Small metallic-looking rock fragment

Uncertain; possibly galena-bearing ore or mica-rich schist

Mixed Mineral Collection

Various Silicates and Oxides

Limonite

FeO(OH)•nH2O

Likely smoky quartz

Quartz (SiO₂), probably smoky variety

Quartz-rich pegmatite (likely feldspar–quartz rock)

Granitic pegmatite; chiefly quartz (SiO₂) and feldspar, with possible mica/iron-oxide staining

Red Sandstone (Iron-stained)

Clastic sedimentary rock (primarily Quartz with Iron Oxides)

Turquoise

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

Raw greenish-blue quartz-bearing mineral specimen

Likely fluorite or chalcedony/quartz; exact identification requires hardness and crystal tests

Fluorite Tower

Fluorite (Calcium Fluoride - CaF2)

Sandstone with Secondary Mineral Encrustation

Arenite with Silica/Calcite deposits (SiO2 or CaCO3)

Erythrite in Cobaltite Ore

Erythrite (Co3(AsO4)2·8H2O) with Cobaltite (CoAsS)

Blue-green mineral fragment, possibly turquoise

Unidentified copper-bearing mineral; turquoise is CuAl₆(PO₄)₄(OH)₈·4H₂O

Gneiss

Metamorphic Gneiss (High-grade regional metamorphism)

Amygdaloidal Basalt

Extrusive mafic igneous rock with amygdules