Pegmatitic granite fragment
Granitic pegmatite, chiefly quartz, feldspar, and mica
igneous
Category
Mineral, Metal (Element)
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Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Slag (Industrial By-product)
Anthropogenic Vitreous Silica/Iron Silicate
mineral
Limonite (Ironstone)
Limonite (FeO(OH)·nH2O)
mineral
Quartz-bearing pegmatitic rock, likely granite/pegmatite
Feldspar–quartz pegmatite; chiefly K-feldspar, plagioclase, quartz, and possible mica
igneous
Sulfide Ore (likely Galena and Sphalerite in Quartz)
Lead-Zinc Ore (PbS and ZnS)
mineral
Black beaded bracelet, likely black onyx or glass
Possibly chalcedony (microcrystalline quartz, SiO₂); the beads may instead be man-made glass
mineral
Pink Granite
Phaneritic Igneous Rock (high K-Feldspar content)
igneous
Slag (Industrial Byproduct)
Ferrous/Non-ferrous Silicate
igneous (artificial/anthropogenic)
Granite
Felsic intrusive igneous rock
igneous
Polished brecciated jasper pendant
Silica-rich jasper (microcrystalline quartz, SiO₂), brecciated and cemented by silica or iron-rich material
sedimentary
Gold-Bearing Quartz
Silicon Dioxide with Native Gold (SiO2 + Au)
mineral
Small cylindrical mineral/stone fragment
Undetermined; the image is insufficient for reliable mineral identification
mineral
Lepidolite on Matrix
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Granite
Intrusive igneous rock composed mainly of quartz, alkali feldspar, and plagioclase
igneous
Quartz-rich pegmatite (weathered feldspar–quartz rock)
Granitic pegmatite; primarily quartz (SiO₂), feldspar, and minor biotite/iron-oxide minerals
igneous
Diamond
Native Carbon (C)
mineral
Manganese Ore (Psilomelane/Pyrolusite)
Psilomelane ((Ba,H2O)2Mn5O10) and Pyrolusite (MnO2)
Mineral
Serpentine
(Mg,Fe)3Si2O5(OH)4
metamorphic
Vanadinite
Vanadinite (Pb5(VO4)3Cl)
mineral
Granite (with Beryl/Aquamarine)
Granite (Feldspar, Quartz, Mica, and Beryl Be3Al2Si6O18)
igneous
Milky Quartz with inclusions
Silicon Dioxide (SiO2)
mineral
Basalt with Quartz Vein
Basalt (fine-grained mafic igneous rock) with crystalline Quartz (SiO2)
igneous
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) within Metasedimentary or Igneous matrix
mineral
Clear faceted gemstone in an ornate metal bracelet
Unidentified transparent faceted stone; possibilities include quartz (SiO₂), zircon (ZrSiO₄), or glass—image alone cannot distinguish them
gemstone
Celestite (Celestine)
Strontium sulfate (SrSO4)
mineral
Gold Ore
Native Gold (Au)
mineral
Olivine
(Mg,Fe)2SiO4
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Opalite
Synthetic glass / Opaque silicious glass
gemstone
Quartz Vein in Pelite (Metamorphic Rock)
Hydrothermal Quartz Veining in Metasedimentary Rock (SiO2)
metamorphic
Granite
Plutonic Igneous Rock
igneous
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Bauxite
Bauxite (Al2O3·2H2O mixed with iron oxides)
sedimentary
Unidentified dark mineral/rock fragment
Indeterminate; appearance may fit a sulfide-bearing rock or iron-rich mineral
mineral
Native Copper with Malachite/Oxide Coating
Native Copper (Cu)
mineral
Quartz–feldspar pegmatite fragment
Granite-family pegmatite, chiefly quartz (SiO₂) and feldspar, with minor mica or sulfide inclusions
igneous
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Granite
Intrusive igneous rock
igneous
Limonite (Iron Stone/Iron Ore)
FeO(OH)·nH2O (Hydrous ferric oxide)
mineral
Bauxite
Bauxite (Al(OH)3, AlO(OH), AlOOH)
sedimentary
Bauxite
Bauxite (Al(OH)3, AlO(OH))
sedimentary