Anthropogenic (Man Made Product Subject To Geological Processes)

Peridot and Citrine Gemstones (in a ring setting)

Peridot (Olivine: (Mg,Fe)2SiO4), Citrine (Quartz: SiO2)

Quartz

Quartz (SiO₂)

Sandstone

Arenite or Sandstone

Gneiss (likely)

Gneiss

Aquamarine and clear quartz

Aquamarine (Be3Al2Si6O18), Quartz (SiO2)

Chert (Flint)

Chert (predominantly SiO₂ - silicon dioxide)

Labradorite (likely Black Labradorite or Larvikite)

Labradorite (Na,Ca)(Al,Si)4O8. If a rock, it is typically anorthosite, gabbro, or norite, or a variety of syenite called Larvikite if it is specifically from Larvik, Norway.

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.

Agate (or Chalcedony)

SiO2 (Silicon Dioxide) - a cryptocrystalline variety of quartz

Red Chalcedony (likely dyed)

Chalcedony (a variety of Quartz), SiO2

Chert (or Flint)

Silicon dioxide (SiO2)

Cobaltoan Calcite / Pink Dolomite (Possible)

Cobaltoan Calcite: (Ca,Co)CO3; Pink Dolomite (or Thulite): CaMg(CO3)2 or Mn-Dolomite / (Thulite: Mn2+3Al2(Si2O7)(SiO4)O(OH))

Biotite Mica

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

Turquoise

Turquoise (CuAl6(PO4)4(OH)8·4H2O)

Smoky Quartz

SiO2 (Silicon Dioxide)

Quartz (pebble)

Quartz (SiO₂)

Schist

Schist (various mineral compositions)

Carnelian

Carnelian (a variety of Chalcedony, SiO2)

Black Chert

Chert (microcrystalline quartz)

Serpentine Jade (New Jade/Olive Jade)

Serpentinite (a rock composed primarily of serpentine minerals) / Mg3Si2O5(OH)4 for Antigorite and Lizardite

Serpentine

Serpentinite (a rock composed primarily of serpentine minerals like antigorite, chrysotile, and lizardite; general formula (Mg, Fe)3Si2O5(OH)4)

Sodalite

Sodalite - Na8(Al6Si6O24)Cl2

Amethyst Geode/Cluster

Quartz (SiO2) - variety Amethyst

Beryl (Variety Mix)

Be3Al2(Si6O18)

Chert Pebble (Jasperoid/Flint)

Silicon Dioxide (SiO2) - cryptocrystalline quartz

Chalcedony (Banded/Mottled Variety)

Chalcedony (a cryptocrystalline variety of Quartz, SiO2)

Selenite

Gypsum (CaSO4·2H2O), specifically the crystalline variety Selenite

Banded Gneiss

Gneiss (typically quartz, feldspar, mica, amphibole composition)

Dolomite

Dolomite (CaMg(CO3)2)

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.

Serpentinite

Serpentinite (a rock composed predominantly of serpentine group minerals)

Schist

N/A (a rock type, not a mineral formula)

Pebble (likely a type of sandstone or quartzite pebble)

Clastic Sediment (specifically, a rudite-sized clast). If the pebble is composed of a specific rock type, its scientific name would be that rock type (e.g., 'Quartzite pebble', 'Granite pebble', 'Chert pebble'). Given its appearance, it is likely a metamorphic quartzite pebble or a hard sandstone pebble.

Granite

Granite (Felsic intrusive igneous rock)

Schist

Schist (various mineralogical compositions including mica, chlorite, talc, etc.)

Diorite (possibly fine-grained variety or a related intermediate intrusive rock like a felsic gabbro or a dark granodiorite)

Diorite (Igneous rock, intrusive, intermediate composition)

Diamond

Diamond (carbon allotrope), C (chemical formula)

Sandstone

Sandstone (lithified arenite/wacke)

Calcite (or Alabaster, if truly carved)

Calcium Carbonate (CaCO3)