Mineral, Specifically A Rock Fragment

Lapis Lazuli

Lapis Lazuli (Complex aggregate mainly of Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Lapis Lazuli

Na8[Al6Si6O24]S2 (Lazurite component), a rock composed primarily of Lazurite, Calcite, and Pyrite

Blue Apatite

Fluorapatite / Chlorapatite [Ca5(PO4)3(F,Cl,OH)]

Lapis Lazuli (Raw Ore)

Na8[Al6Si6O24]n(S,Cl,SO4,OH)2 (Lazurite component)

Amber

Succinite (specifically for Baltic amber); Fossilized Tree Resin (C10H16O)

Sandstone (Quartzose)

Arenite (Siliciclastic sedimentary rock)

Milky Quartz

Silicon Dioxide (SiO2)

Hypersthene

Hypersthene (formula: (Mg,Fe)SiO3)

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Bicolor Quartz Pebble

Silicon Dioxide (SiO2) with mineral inclusions

Basalt

Mafic Igneous Rock (composed primarily of Pyroxene and Plagioclase Feldspar)

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) within Metasedimentary or Igneous matrix

Basalt with Plagioclase Phenocrysts (Porphyritic Basalt)

Porphyritic Basalt (Mafic volcanic rock)

Rose Quartz

Silicon Dioxide (SiO2)

Red Jasper with Quartz Veining

Jasper (Silicon Dioxide, SiO2) with Quartz (SiO2) inclusions

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Milky/Granular)

Silicon Dioxide (SiO2)

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) within a metamorphic matrix

Granitic Gneiss

Gneiss (Metamorphic rock of granitic composition)

Chalcedony in Limestone Host Rock

Silicon Dioxide (SiO2) within Calcium Carbonate (CaCO3)

Limestone with Quartz or Calcite Veining

Calcium Carbonate (CaCO3) matrix with SiO2 or CaCO3 inclusions

Sandstone (Pet Rock)

Clastic sedimentary rock (primarily SiO2)

Sandstone with Manganese Dendrites/Oxide coatings

Arenite with Pyrolusite and Romanechite (MnO2)

Granite

Plutonic Igneous Rock (composed typically of SiO2, Al2O3, K2O, Na2O, CaO)

Vesicular Basalt (or Porphyritic Scoria)

Vesicular Basalt

Druzy Quartz (on Chalcedony/Agate base)

Silicon Dioxide (SiO2)

Olivine in Basalt (Peridot)

Magnesium Iron Silicate (Mg,Fe)2SiO4 (Mineral) / Scoriaceous Basalt (Host Rock)

Gold-Bearing Quartz

Silicon Dioxide with Native Gold (SiO2 + Au)

Granite

Granite (Felsic Plutonic Rock)

Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Quartz Geode

Silicon Dioxide (SiO2) in Geode form

Gossan (Iron Hat) with Quartz and Chlorite

Limonite/Goethite-rich Gossan (FeO(OH)·nH2O) with inclusions of Quartz and Chlorite

Granite Cobble

Felsic Intrusive Igneous Rock (Granite)

Kambaba Jasper

Stromatolite / Fossilized Algae (Rhyolitic structure)

Bronzite

MgSiO3 (Enstatite with 10-30% FeSiO3 in solid solution)

Gneiss (High-Grade Metamorphic Rock)

Gneiss (primarily composed of Quartz, Feldspar, and Mica/Amphiboles)

Granite

Granite (Mainly Quartz, Alkali Feldspar, and Plagioclase)

Obsidian

Volcanic Glass (SiO2)

Digital Multimeter (Synthetic Object)

Digital Multimeter (DMM)

Serpentinite (often containing Jadeite/Nephrite)

Antigorite-rich Serpentine Rock, (Mg, Fe)3Si2O5(OH)4

Granite

Granite (Felsic Plutonic Rock)

Marble

Recrystallized Calcite (CaCO3)