Man Made Material (Jewelry, Metal Alloy)

Pyrite

Iron Pyrite (FeS₂)

Diamond

Carbon (C)

Agate

Agate (a variety of Chalcedony, SiO2)

Quartz (likely) / Siliceous rock with quartz phenocrysts (if a rock fragment)

Quartz (SiO₂)

Peridot

Olivine (specific variety: gem-quality forsterite), (Mg,Fe)2SiO4

Turquoise

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

Quartz

Quartz (SiO2 - Silicon Dioxide)

Quartz (possibly milky quartz or quartz with inclusions)

SiO2 (Silicon Dioxide)

Sapphire (likely blue synthetic sapphire or blue glass in a ring)

Corundum (Al₂O₃), specifically the blue variety due to trace amounts of iron and titanium impurities. If synthetic, it would still be Al₂O₃.

Diamond

Diamond (C)

Clear Quartz (or Rock Crystal)

Quartz (SiO₂ - Silicon Dioxide)

Granite

Granite (a common type of Felsic Intrusive Igneous Rock)

Garnet (likely Almandine, Pyrope, or a blend)

Garnet group minerals: X3Y2(SiO4)3, where X and Y represent various metal ions (e.g., Almandine: Fe3Al2(SiO4)3, Pyrope: Mg3Al2(SiO4)3)

River Rock / Stream Pebble

Fluvial Clast / Rounded Sedimentary Particle

Mookaite Jasper

Siliceous (chert) sedimentary rock, a form of Jasper

Fossil Coral

Coral Limestone (a type of biogenic sedimentary rock)

Bloodstone / Heliotrope

Silicon dioxide (SiO2) with inclusions

Quartzite

Quartzite (primarily SiO2)

Almandine Garnet

Almandine (Fe3Al2(SiO4)3)

Magnetic Hematite

Magnetized Hematite (an iron oxide mineral, Fe2O3, that has undergone magnetization)

Granite

Granite (a plutonic igneous rock composed of quartz, feldspar, and mica)

Pebble (likely Quartzite or Chert)

Clastic Sediment, potentially composed of SiO₂ (Quartz)

Amethyst Geode/Cluster

Quartz (SiO2) - variety Amethyst

Fossilized Wood (Petrified Wood)

Silicified Wood (primarily quartz/chalcedony replacing organic matter)

Quartz (likely Milky Quartz or Chalcedony)

Quartz (SiO2 - Silicon Dioxide)

Dyed Howlite (simulating Lavender/Purple Jade or Charoite)

Howlite: Ca2B5SiO9(OH)5 (when natural)

Green Aventurine and Clear Quartz

Green Aventurine (Silicon Dioxide - SiO2 with Fuchsite inclusions); Clear Quartz (Silicon Dioxide - SiO2)

Serpentinite (Serpentine Rock)

Serpentinite is a rock composed of one or more serpentine group minerals, chiefly antigorite, chrysotile, and lizardite, with the general formula (Mg,Fe)3Si2O5(OH)4. Often includes other minerals like magnetite, talc, and chromite.

Fuchsite Quartzite

Fuchsite-bearing Quartzite

Quartzite

Quartzite

Calcite

Calcite (CaCO3)

Mookaite Jasper

Siliceous sedimentary rock (variety of Jasper/Chert)

Quartz

Quartz (SiO₂)

Peridot (Olivine)

Olivine ((Mg,Fe)2SiO4)

Orange Calcite

Calcite (Calcium Carbonate, CaCO3)

Diamond (Rough)

Diamond (Carbon, C)

Sugilite

Sugilite (KNa2(Fe,Mn,Al)2Li3Si12O30)

Moonstone (bead form)

Potassium Aluminum Silicate (KAlSi3O8) - a variety of Orthoclase Feldspar

Gneiss

Gneiss (a rock type, not a specific mineral with a formula)

Quartz (pebble)

Quartz (SiO₂)

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)

Quartz (likely Milky Quartz)

Quartz (SiO₂ - Silicon Dioxide)