Mineral (Impactite)

Eudialyte

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

Quartz–calcite sulfide-bearing mineral specimen

Quartz (SiO₂) with likely calcite (CaCO₃) and iron sulfides, possibly pyrite (FeS₂); exact species requires testing

Amygdaloidal Basalt

Extrusive mafic igneous rock with amygdules

Blue-green glassy mineral specimen, likely aquamarine or pale fluorite

Tentatively beryl (Be₃Al₂Si₆O₁₈), aquamarine variety; identification is uncertain from the photograph

Erythrite in Cobaltite Ore

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

Tumbled serpentine (likely bowenite)

Serpentine-group minerals, chiefly antigorite/lizardite; commonly Mg₃Si₂O₅(OH)₄

Likely pink granite

Granite, a coarse-grained felsic intrusive igneous rock, typically quartz + feldspar + mica

Polished rhyolite (likely rainforest jasper)

Rhyolite, a silica-rich volcanic rock; exact identification cannot be confirmed from the photo

Granite (likely weathered)

Granite, a quartz–feldspar–mica intrusive igneous rock

Tumbled pink granite

Granite (quartz, feldspar, and mica; exact variety uncertain)

Banded Sedimentary Rock

Stratified Siliciclastic / Arenite or Siltstone with Mineral Bands

Fossil Sea Urchin (Echinoid)

Echinoidea fossil (often replaced by silica or calcite)

Granite

Felsic intrusive igneous rock

Nephrite Jade

Nephrite

Pearl jewelry

Pearl (biogenic calcium carbonate, primarily aragonite, CaCO₃)

Quartz crystal cluster (likely iron-stained quartz)

Quartz, silicon dioxide (SiO₂), with possible iron-oxide inclusions

Blue apatite (likely dyed or enhanced)

Apatite group; fluorapatite, Ca5(PO4)3F, is the common blue variety

Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Gneiss

Gneiss

Gneiss (likely Granitic Gneiss)

Gneiss

Diorite

Diorite (Intermediate intrusive igneous rock)

Granite

Granite (Mainly Quartz, Alkali Feldspar, and Plagioclase)

Limestone with Calcite Veins

Calcium Carbonate (CaCO3)

Banded Gneiss

Gneiss (high-grade metamorphic silicate rock)

Granite Gneiss

Gneiss (High-grade Metamorphic Rock)

Foliated Metamorphic Rock (likely Gneiss or Schist)

Gneissic Metamorphic Rock

Gneiss

Gneiss (high-grade metamorphic rock)

Quartz-rich pegmatite, likely with iron staining

Granitic pegmatite, chiefly quartz (SiO₂) and feldspar, with possible mica and iron oxides

Mica-rich metamorphic rock, likely schist

Muscovite–biotite schist, possibly with quartz and feldspar

Limonite Concretion

Limonite (FeO(OH)·nH2O) Pseudomorph

Limonite (Iron Ore)

Hydrated ferric oxide mixture (FeO(OH)·nH2O)

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

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

Polished bumblebee jasper bead

Bumblebee jasper (trade name); chiefly calcite, aragonite, and pyrite, with variable realgar/orpiment and other minerals

Weathered granite or granitic gneiss

Granite; chiefly quartz, feldspar, and mica, possibly with gneissic foliation

Garden Quartz (Lodalite)

Silicon Dioxide with various mineral inclusions (SiO2)

Polished agate geode slice

Microcrystalline quartz (chalcedony), SiO₂, with possible quartz-lined or calcite-filled cavity

Likely granitic gneiss pebble

Quartz–feldspar–biotite gneiss (visual identification; exact type uncertain)

Mica Schist / Granite

Mica Schist (Silicate metamorphic rock)

Fluorite

Calcium Fluoride (CaF2)

Limonite (Iron Ore / Ochre)

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