Mineral (Man Made Composite)

Native Copper

Native Copper (Cu)

Sandstone with Magnetite and Iron Staining

Clastic Sedimentary Rock (contains Fe3O4 and Limonite/Hematite)

Granitic Gneiss

Gneiss (Metamorphic Rock)

Sandstone (Graywacke)

Clastic Sedimentary Rock (Lithic Sandstone)

Lapis Lazuli (polished cabochon)

Lazurite-rich metamorphic rock (approx. Na6Ca2Al6Si6O24(SO4,S,Cl)2)

Lapis Lazuli

Sodium aluminum silicate with sulfur (main component: Lazurite [(Na,Ca)8(AlSiO4)6(SO4,S,Cl)2])

Bauxite

Bauxite (Al2O3·2H2O)

Limonite (Ironstone)

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

River Rock / Stream Pebble

Fluvial Clast / Rounded Sedimentary Particle

Emerald

Beryl (Be₃Al₂(SiO₃)‑₆) with Chromium/Vanadium impurities

Greywacke (likely)

Greywacke (a type of sandstone)

Quartz Mineral

Silicon Dioxide (SiO2)

Quartz Mineral

Silicon Dioxide (SiO2)

Orthoclase Feldspar

Potassium aluminum silicate (KAlSi3O8)

Orthoclase Feldspar

KAlSi3O8 (Potassium Aluminum Silicate)

Gneiss

Gneiss

Fossil Shark Tooth

Carcharocles (Otodus) sp. or similar fossilized Chondrichthyes tooth

Drill Core Samples (Varied Lithology)

Multi-lithological core samples (containing potential granite, marble, and phyllite/schist sequence)

Red Sandstone (Iron-Rich)

Arenite (Fe2O3)

Orthoclase Feldspar

Orthoclase (KAlSi3O8)

Coprolite

Coprolite

Quartz Geode/Druzy Quartz

Quartz (SiO₂)

Gold Mineral

Native Gold (Au)

Bauxite

Bauxite (Al(OH)3 mixed with Fe2O3 and clay minerals)

Limonite (Iron Ore)

FeO(OH)·nH2O (Hydrous ferric oxide)

Gneiss

Gneiss (High-grade metamorphic rock)

Granite

Granite

Fluorite

Calcium Fluoride (CaF2)

Fluorite Carving

Fluorite (Calcium Fluoride, CaF2)

Fluorite

Calcium Fluoride (CaF2)

Bauxite (Pisolitic Bauxite)

Bauxite (mixture of Hydrous Aluminum Oxides)

Given the appearance, it's likely a fragment of an igneous or metamorphic rock composed of multiple minerals. Without specific diagnostic features, it's difficult to give a common name other than 'crystalline rock fragment'. If pressed to guess based on the granular, somewhat light and dark speckled appearance, it could be a fragment of granite or a related intrusive igneous rock.

As a rock fragment, it does not have a single scientific mineral name; rather, it's a piece of a rock which is a combination of minerals. If it were granite, its main mineral composition would be quartz (SiO2), feldspar (e.g., KAlSi3O8 - orthoclase, (Na,Ca)(Al,Si)4O8 - plagioclase), and mica (e.g., KAl2(AlSi3O10)(OH)2 - muscovite or K(Mg,Fe)3AlSi3O10(OH)2 - biotite), among others.

Lapis Lazuli

Lapis Lazuli (A complex rock primarily composed of Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Lapis Lazuli (Raw)

Lazurite-rich metamorphic rock; Na3Ca(Al3Si3O12)S

Lapis Lazuli

Lapis Lazuli (Mineral composition: Lazurite (Na,Ca)8(AlSiO4)6(SO4,S,Cl,OH)2, Calcite, and Pyrite)

Sandstone Pebble

Arenite (primarily SiO2)

Sandstone (Quartzose Sandstone)

Arenite

Green Fluorite

Calcium Fluoride (CaF2)

Kidney Stone

Calcium Oxalate (CaC2O4·nH2O)

Spinosaurus fossil (permineralized bone)

Spinosaurus aegyptiacus (Calcium phosphate mineralized with silica/sediment)

Vesicular Basalt

Amygdaloidal Basalt (Mafic extrusive volcanic rock)

Gneiss

Gneiss