Man Made Object (Metal Alloy)

Iron Meteorite

Siderite (Iron-Nickel Alloy)

Arsenopyrite

Arsenopyrite (FeAsS)

Crushed Limestone

Calcium Carbonate (CaCO3)

Copper-Bearing Sulfide Ore (likely Chalcopyrite or Bornite)

Chalcopyrite (CuFeS2) or Bornite (Cu5FeS4) in host rock

Native Copper (Tumbled Nugget)

Cu (Native Element)

Lapis Lazuli

Lapis Lazuli (Rock containing Lazurite, Calcite, and Pyrite)

Silver (Native Element)

Silver (Ag) in an alloy of 90% Silver and 10% Copper

Dark rounded pebble, likely basalt or slag

Probable fine-grained mafic rock; possibly basalt (plagioclase–pyroxene) or industrial iron/steel slag

Aventurine

Quartz (SiO2) with fuchsite inclusions

Pyrite

Iron Sulfide (FeS2)

Fossilized Shark Tooth (Fragment)

Elasmobranchii gen. et sp. indet. (Calcium Phosphate / Apatite fossil)

Granite

Granite (a plutonic rock)

Basalt

Basalt (Mafic volcanic rock)

Iron Meteorite / Limonite-coated Meteorite / Iron Nodule

Iron-Nickel Alloy (Kamacite and Taenite) with weathering crust

Jade

Jade can refer to two distinct minerals: Nephrite (a variety of the mineral actinolite, Ca2(Mg,Fe)5Si8O22(OH)2) and Jadeite (Na(Al,Fe3+)Si2O6). Based on the image, showing a relatively uniform green color and possibly slight translucence in bead form, it is very likely one of these, but determining which one from a photo is difficult without specific testing.

Diamond in Gold Setting

Diamond (C - pure carbon)

Fluorite

Calcium Fluoride (CaF2)

Milky Quartz

Silicon Dioxide (SiO2)

Bismuth

Bismuth (element Bi) with oxidized thin-film interference layer

Milky Quartz

Silicon dioxide (SiO2)

Green calcite (likely)

Calcite — calcium carbonate, CaCO₃

Silver (Native Silver Mineral)

Ag (Native Silver), Alloyed 90% Ag / 10% Cu

Granite

Intrusive Igneous Rock

Granite

Intrusive igneous rock composed mainly of quartz, alkali feldspar, and plagioclase

Arsenopyrite in Sulphide Ore

Arsenopyrite (FeAsS)

Polished tiger iron

Tiger iron; interlayered hematite, jasper, and crocidolite-quartz (often riebeckite)

Fluorite

Calcium Fluoride (CaF2)

Rutilated Quartz

Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions

BROWN GRANITE (likely 'Tan Brown' or similar)

Granite (specifically a variety rich in orthoclase feldspar, often with biotite and possibly hornblende)

Scoria

Scoriaceous Basalt

Green Calcite

Calcite (CaCO3)

Quartz (likely a macrocrystalline variety like milky quartz or smoky quartz, given the appearance in the image)

Quartz (SiO₂ - Silicon Dioxide)

Petoskey Stone

Hexagonaria percarinata

Granite

Intrusive igneous rock

Iron Meteorite

Meteoritic Iron (Fe-Ni alloy)

Green Aventurine

Quartz (SiO2) with fuchsite inclusions

Fluorite

Calcium Fluoride (CaF2)

Iridium sand or Osmium-Iridium nugget

Iridosmine / Osmiridium (Platinoid grouping)

Gold Nuggests

Native Gold (Au)

Native Gold Nugget

Native Gold (Au)

Silicon

Element Si

Blue-green chrysocolla rough specimen

Chrysocolla, hydrated copper aluminosilicate; commonly associated with malachite, quartz, and limonite