Mineral (Man Made Composite)

Conglomerate

Conglomerate (Clastic Sedimentary Rock)

Diamond Druzy (Crystalline Diamond)

Carbon (C)

Banded Gneiss

Gneiss (Foliated Metamorphic Rock)

Diamond (Cut jewelry specimen)

Diamond (pure Carbon, C)

Turquoise (likely stabilized or simulated Howlite)

CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminium)

Grey Chalcedony

Silicon Dioxide (SiO2)

Diamond (as featured in jewelry)

Diamond (C - pure carbon)

Polished jasper pebble

Jasper, an opaque microcrystalline variety of quartz (SiO₂), with possible iron-oxide and other mineral inclusions

Jade bangle

Likely nephrite jade (fibrous amphibole, Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂); possibly jadeite (NaAlSi₂O₆)

Iron-Nickel Meteorite (Possible Chondrite or Oxidized Iron)

Siderite (Nickel-Iron) or Chondrite (Si/Fe composite)

Freshwater Pearl

Calcium Carbonate (CaCO3) - Aragonite/Calcite organic composite

Unakite

Altered Granite (Epidotized Granite)

Rough Sapphire (Corundum)

Corundum (Al2O3)

Ruby in Matrix

Corundum (Al2O3)

Opal (in Jewelry Setting)

Hydrated Silicon Dioxide (SiO2·nH2O)

Sea glass (likely pale blue glass)

Human-made silicate glass, likely soda-lime glass; not a natural mineral or rock

Malaysian 50 Sen Coin

Coinage (specific alloy unknown without metallurgical analysis, but typically brass or bronze for this denomination and era)

Quartzite (or Quartz Slab)

SiO2 (Silicon Dioxide)

Green sea glass (likely)

Anthropogenic glass, not a mineral; composition commonly soda–lime silicate glass

Milky quartz

Quartz (silicon dioxide, SiO₂)

Polished basalt or basaltic river pebble

Basalt; fine-grained plagioclase–pyroxene rock, possibly containing olivine

Blue chalcedony cabochon (likely)

Chalcedony, microcrystalline SiO₂; possibly blue agate or common opal, which cannot be distinguished confidently from the image

White drusy quartz

Quartz, silicon dioxide (SiO₂), with a drusy coating of tiny crystals

Fossil Shark Tooth

Lamniform (Mackerel Shark) fossil tooth, likely Otodus or Cretalamna

Chert

Microcrystalline Quartz (SiO2)

Pink Granite

Phaneritic Felsic Igneous Rock (Granite)

Gypsum (Satin Spar / Alabaster variety)

Calcium Sulfate Dihydrate (CaSO4·2H2O)

Chalk

Micrite (primarily Calcium Carbonate, CaCO3)

Blue glass-like bead or gemstone keychain ornament

Indeterminate; likely cobalt-blue glass or synthetic blue spinel, not identifiable as a natural mineral from the image

Diamond

Carbon (C)

Goldstone (aventurine glass)

Synthetic copper-bearing soda-lime glass; commonly sold as red goldstone

Tumbled quartz (likely milky quartz)

Quartz, silicon dioxide (SiO₂)

Beaded gemstone bracelet

Indeterminate; likely small polished mineral beads, possibly turquoise or dyed stone, with metal and glass components

Tumbled blue chalcedony (possibly blue agate)

Microcrystalline quartz, SiO₂; chalcedony variety

Milky quartz pebble

Quartz, silicon dioxide (SiO₂)

Tourmalinated Quartz

Quartz (SiO2) with included Tourmaline (complex borosilicate)

Tiger Shark Fossil Tooth

Galeocerdo cuvier (fossilized)

Polished stone sphere, possibly agate or jasper

Likely microcrystalline quartz (SiO₂); exact variety cannot be confirmed from the image

Opal ring

Opal (hydrated amorphous silica, SiO₂·nH₂O)

Crinoid stem fossil

Crinoidea

Diamond in Kimberlite

Diamond (C in Kimberlite)

Orange glassy slag (industrial by-product)

Iron-rich silicate glass; composition varies, commonly Fe–Ca–Al silicate