Mineral (Processed Alloy)

River Rock

Sedimentary Rock (various compositions)

Red Jasper

Jasper (a variety of Chalcedony, SiO₂ with iron oxide inclusions)

Sandstone (likely a river or beach pebble)

Sandstone (a clastic sedimentary rock)

Quartzite

Quartzite

Goldstone

N/A (Synthetic Glass with Copper Inclusions)

Mother of Pearl (Nacre)

Calcium Carbonate (primarily aragonite, with conchiolin)

Travertine (used in construction, not a 'specimen' in situ)

Travertine

Sandstone

Arenite (general term for sandstone)

Amber (Black)

Amber (succinite, retinite, etc., specifically, heavily included/dark varieties)

Shale

Shale (fine-grained clastic sedimentary rock)

Quartz

Quartz (SiO₂ - Silicon Dioxide)

Amethyst Geode/Cluster

Quartz (SiO2) - variety Amethyst

Petrified Wood

Silicified wood, primarily composed of Quartz (SiO2)

Quartz

Quartz (SiO₂)

Greywacke (likely)

Greywacke (a type of sandstone)

Iron Ore / Ironstone Concretion

Mixture of iron oxide/hydroxide minerals, likely some combination of Hematite (Fe2O3), Goethite (α-FeOOH), and Limonite (a general term for hydrated iron oxides of variable composition) or potentially Bauxite (a mixture of aluminum hydroxides, often with iron oxides, (Al(OH)3) and FeO(OH)). The visual characteristics strongly suggest iron-rich material.

Scoria

Scoria (a vesicular basalt or andesite)

Banded Metamorphic Rock (likely Quartzite or Serpentinite/Soapstone)

Metamorphic Rock (possibly a banded Quartzite or a foliated Serpentinite/Talc Schist based on appearance, general term for such a rock is 'Banded Metamorphic Rock' or 'Gneiss' if pronounced banding of different minerals)

Marble

Marble (metamorphosed limestone/dolostone). Predominantly composed of Calcite (CaCO3) for marble derived from limestone, or Dolomite (CaMg(CO3)2) for marble derived from dolostone.

Golden Sheen Obsidian

Obsidian (volcanic glass) with inclusions of gas bubbles and mineral crystals (e.g., hematite, magnetite) causing the sheen

Puddingstone

Conglomerate (specifically a type of jasper conglomerate or quartz conglomerate)

Quartz (possibly milky quartz)

Quartz (Silica; SiO₂)

Fluorite

Fluorite (Calcium Fluoride, CaF2)

Pumice

Pumice (volcanic rock)

Sandstone (Pebble/Cobble)

Sandstone (arenite is a more precise term for sandstone with less than 15% matrix; this specimen appears to be a lithic or quartz arenite)

Basalt

Basalt (dominated by plagioclase feldspar and pyroxene)

Conglomerate

Conglomerate

Pebble or Cobble (likely composed of sandstone or conglomerate)

Clastic Sedimentary Rock (specific name like sandstone, conglomerate, or breccia would require microscopic analysis of clast size and angularity)

Obsidian (likely Golden Sheen Obsidian or Rainbow Obsidian, given the subtle sheen visible on some beads)

Obsidian (volcanic glass, predominantly SiO2 with various impurities)

Quartz

Quartz (SiO2 - Silicon Dioxide)

Granite (likely a river or beach pebble)

Granite (a felsic intrusive igneous rock primarily composed of quartz, feldspar, and mica)

Agate (or Banded Agate)

Agate (a variety of Chalcedony, which is a cryptocrystalline form of Quartz); Chemical Formula: SiO₂ (Silicon Dioxide)

Calcite (or Alabaster, if truly carved)

Calcium Carbonate (CaCO3)

Jade

Jadeite or Nephrite

Red Jasper

Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)

Unable to identify - Image contains non-geological items

Schist

Schist (various mineralogical compositions including mica, chlorite, talc, etc.)

Petrified Wood

Silicified Wood (SiO2)

Schist

N/A (a rock type, not a mineral formula)

Chert or Flint (polished/water-worn)

Chert (a microcrystalline or cryptocrystalline variety of quartz, SiO2). Flint is a specific variety of chert.

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Chert (Flint)

Cryptocrystalline Quartz (SiO2)