Organic (Geological Relative)

Carved quartz skull

Quartz (silicon dioxide, SiO₂)

Chrome Diopside

Magnesium Calcium Silicate (MgCaSi2O6) containing Chromium impurities

Scoria (Vesicular Basalt)

Vesicular Basalt

Vesicular basalt (likely weathered scoria)

Basaltic volcanic rock; chiefly plagioclase, clinopyroxene, and olivine with vesicles

Arsenopyrite with Quartz

Arsenopyrite (FeAsS)

Flower Agate (Cherry Blossom Agate)

Chalcedony (SiO2) with Opaque Inclusions

Serpentine Schist with Quartz Vein

Serpentine Schist (a type of Metamorphic rock). The white band is likely Quartz (SiO2).

Red Scoria (Lava Rock)

Vesicular Basalt / Scoria

Coquina

Biogenic Limestone (Calcium Carbonate, CaCO3)

Greenstone

Metabasalt / Chlorite Schist

Rhodonite

Rhodonite (Manganese Iron Magnesium Calcium Silicate) - (Mn,Fe,Mg,Ca)SiO3

Tumbled howlite (likely)

Howlite, Ca₂B₅SiO₉(OH)₅

Fluorite (Purple Fluorite in Matrix)

Fluorite (Calcium Fluoride, CaF2)

Psilomelane (Black Hematite/Manganese Ore)

Barium Manganese Oxide (Formula: BaMn9O18(OH)4)

Fluorite (Rainbow or Multi-colored Fluorite)

Fluorite (Calcium Fluoride - CaF2)

Grooved Maun Ball (Maul/Hammerstone-like Concretion)

Calcareous/Ferruginous Concretion in Sandstone Matrix

Granite

Granite (phaneitic intrusive igneous rock)

Tumbled citrine quartz (likely heat-treated amethyst)

Quartz, SiO₂; crystalline variety citrine

Chrysocolla

Chrysocolla (Cu,Al)2H2Si2O5(OH)4·nH2O

Anthracite Coal

Coal (predominantly carbon)

Quartz (Milky or Clear Quartz fragment)

Silicon Dioxide (SiO2)

Polished black stone egg, probably black obsidian

Obsidian, a natural volcanic glass; composition primarily silica-rich glass (approximately SiO₂), with variable iron and other trace elements

Fordite

Anthropogenic paint-rock

Chert (varietal Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Likely polished leopard-skin jasper or brecciated jasper

Jasper, an opaque microcrystalline variety of quartz (SiO₂), with iron-oxide and other mineral inclusions; exact variety cannot be confirmed from the image alone

Ruby Fuchsite / Ruby in Fuchsite

Ruby (Al2O3 variety corundum) and Fuchsite (K(Al,Cr)2AlSi3O10(OH)2 - a chromium-rich variety of muscovite mica) in Quartz matrix

Jadeite Jade

NaAlSi2O6 (Sodium Aluminum Silicate)

Yellow calcite (tumbled honey or lemon calcite)

Calcite, calcium carbonate (CaCO₃), likely a yellow/orange calcite variety

Amethyst

Amethyst is a variety of Quartz (SiO₂)

Zebra Jasper

Silicon dioxide (SiO2) with various impurities

Apatite

Apatite group mineral (e.g., Fluorapatite - Ca5(PO4)3F, Chlorapatite - Ca5(PO4)3Cl, Hydroxylapatite - Ca5(PO4)3(OH))

Moonstone

Orthoclase Feldspar (specifically showing adularescence)

Banded agate pendant (likely carnelian or brown-and-white chalcedony agate)

Agate, a banded variety of chalcedony; microcrystalline quartz, SiO₂, with iron-oxide coloration

Obsidian

Volcanic Glass (predominantly SiO2 – Silicon Dioxide, but non-crystalline)

Biotite Mica

Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)

Rose Quartz

Rose Quartz (SiO₂)

Obsidian

Volcanic Glass (Primary composition: SiO2 - Silicon Dioxide)

Ocean Jasper

Silicon Dioxide (SiO2)

Orange Calcite

Calcite (CaCO3)

Mookaite Jasper

Siliceous (chert) sedimentary rock, a form of Jasper

Polished black stone, likely black obsidian

Obsidian (volcanic glass; mainly SiO₂)

Pink quartz bead necklace/strand

Quartz, silicon dioxide (SiO₂), likely rose quartz or pink chalcedony; exact identification is uncertain from the image