Igneous And Sedimentary Mixture

Dyed Agate

Silicon Dioxide (Chalcedony with artificial colorant), SiO2

Bauxite

Bauxite (Mixture of Al(OH)3, AlO(OH), and Fe2O3)

Bauxite

Hydrated aluminium oxides mixture (primarily gibbsite, boehmite, and diaspore)

Septarian Nodule

Septarian concretion (Complex mixture of Siderite/Limestone, Calcite, and Aragonite)

Bauxite

AlOx(OH)3-2x (mixture of Gibbsite, Boehmite, and Diaspore)

Bauxite

AlOx(OH)3-2x (mixture of Gibbsite, Boehmite, and Diaspore)

Quartz Pebble

Silicon Dioxide (SiO2)

Chalcedony (Agate/Carnelian variant)

Silicon Dioxide (SiO2)

Asphalt (Bituminous Concrete)

Bituminous mix / Anthropogenic conglomerate

Rough Corundum (Sapphire/Ruby mixture)

Corundum (Aluminum Oxide, Al2O3)

Pyrite

Iron Pyrite (FeS2)

Chalcedony (Agate/Carnelian)

Silicon Dioxide (SiO2)

Hematite

Hematite (Fe₂O₃), likely a polished specular hematite palm stone

Chalcedony

Chalcedony (SiO2)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Epidote

Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))

Polished golden mineral specimen, likely golden calcite or citrine quartz

Identification uncertain from the photograph; possibilities include calcite (CaCO₃) or quartz (SiO₂), with the color potentially enhanced by polishing or coating

Bumblebee Jasper

Calcite-Auripigment-Pyrite-Realgar assemblage (Carbonate/Sulphide mixture)

Bloodstone (Heliotrope)

Silicon Dioxide (SiO2) with Iron Oxide / Chlorite inclusions

Tumbled quartz (likely milky quartz)

Quartz, silicon dioxide (SiO₂)

Red Agate

Chalcedony (SiO2)

Auriferous Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Yellow Chalcedony (Agate Pebble)

Silicon Dioxide (SiO2)

Likely smoky quartz or quartz-rich tumbled fragment

Quartz, silicon dioxide (SiO₂), possibly smoky quartz

Lapis Lazuli

Lapis lazuli (Complex silicate mixture including Lazurite, Calcite, and Pyrite)

Quartz crystal fragment

Quartz (silicon dioxide, SiO₂)

Weathered iron-rich stone, possibly limonite-bearing sandstone or laterite

Limonite/goethite-rich material; composition commonly FeO(OH)·nH₂O with clay and quartz impurities

Conglomeratic aggregate / pebble-rich concrete-like rock

Polymictic conglomerate (likely glacial or beach-derived gravel matrix); exact identification uncertain from image

River Pebble (Quartzite/Siltstone mixture)

Silicon Dioxide (SiO2) mixture with varied clastic minerals

Quartz (Citrine or Iron-Stained variety)

Silicon Dioxide (SiO2)

Chalcedony (Common Agate)

Silicon Dioxide (SiO2)

Nephrite Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

Quartz (clear quartz/crystal quartz)

Quartz, silicon dioxide (SiO₂), trigonal crystal system

Pyrite

Iron Sulfide (FeS2)

Likely clear quartz crystal (possibly cut/polished quartz or glass imitation)

Quartz, silicon dioxide (SiO₂)

Jasper and Agate Beads (Mahogany Obsidian, Dyed Agate, Turquoise/African Turquoise)

Silicon Dioxide (SiO2) mixture with inclusions / Hydrated Copper Aluminum Phosphate

Dark metallic-looking mineral specimen, possibly magnetite

Magnetite (Fe₃O₄), tentative identification

Limonite (Iron Ore/Hydrated Iron Oxide)

Limonite (mixture of FeO(OH)·nH₂O minerals, mainly Goethite, FeO(OH) and Lepidocrocite, FeO(OH))

Indian Agate

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Small quartz fragment (probable)

Quartz, SiO₂

Agate

Silicon Dioxide (Chalcedony), SiO2

Tumbled quartz (likely milky/rose quartz)

Quartz, silicon dioxide (SiO₂)