Organic (Geological Relative)

Chalcedony (Banded/Mottled Variety)

Chalcedony (a cryptocrystalline variety of Quartz, SiO2)

Blue Howlite (Dyed)

Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)

Greenschist

Greenschist facies metamorphic rock

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.

Black Tourmaline

Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)

Granite

Granite (a common type of Felsic Intrusive Igneous Rock)

Quartz (vein quartz)

SiO2 (Silicon Dioxide)

Carnelian

Chalcedony (cryptocrystalline quartz), SiO2 (Silicon Dioxide)

Jade (Nephrite or Jadeite)

Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (Na(Al,Fe3+)Si2O6)

Turquoise

Turquoise (Hydrated copper aluminum phosphate, CuAl6(PO4)4(OH)8·4H2O)

Pegmatite (likely Granitic Pegmatite)

Pegmatite (a coarse-grained igneous rock, often with granitic composition)

Turquoise (beads)

Turquoise; CuAl6(PO4)4(OH)8·4H2O

Selenite

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

Citrine

Quartz (SiO2) - variety Citrine

Puddingstone (Jasper Conglomerate)

Conglomerate (specific type: Jasper Conglomerate or Hertfordshire Puddingstone)

Bronzite

MgSiO3 (Enstatite with 10-30% FeSiO3 in solid solution)

Amethyst

Quartz (SiO2) variety

Jade (Nephrite or Jadeite)

Nephrite: Ca2(Mg,Fe)5Si8O22(OH)2 (amphibole mineral); Jadeite: NaAlSi2O6 (pyroxene mineral)

Jasper

Silicon Dioxide (SiO2) - a variety of Chalcedony (Cryptocrystalline Quartz)

Tiger's Eye

Tiger's Eye (a variety of Quartz, SiO₂)

Carnelian

Carnelian (a variety of Chalcedony, SiO2)

Citrine Geode (or Druzy Citrine)

Silicon Dioxide (SiO₂) - a variety of Quartz

Calcite

Calcite (Calcium Carbonate, CaCO3)

Banded Metamorphic Rock (likely Quartzite or Serpentinite/Soapstone)

Metamorphic Rock (possibly a banded Quartzite or a foliated Serpentinite/Talc Schist based on appearance, general term for such a rock is 'Banded Metamorphic Rock' or 'Gneiss' if pronounced banding of different minerals)

Calcite (likely a tumbled specimen)

Calcite (CaCO 3 )

Amethyst

Quartz (SiO2) with trace iron impurities

Quartzite

Quartzite (primarily SiO2)

Golden Sheen Obsidian

Obsidian (volcanic glass) with inclusions of gas bubbles and mineral crystals (e.g., hematite, magnetite) causing the sheen

Quartz (beads)

SiO2 (Silicon Dioxide)

Jade (likely Nephrite or Jadeite)

Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (Na(Al,Fe3+)Si2O6)

Carnelian

Chalcedony (cryptocrystalline quartz), SiO2

Scoria

Scoria (a vesicular basalt or andesite)

Granite

Granite (a felsic intrusive igneous rock)

Chert

Chert (microcrystalline quartz)

Gneiss

Gneiss (a metamorphic rock)

Quartz

Quartz (SiO₂)

Fossiliferous Limestone

Limestone (composed primarily of calcite with included fossils CaCO3)

Amazonite

KAlSi3O8 (Potassium Feldspar, variety of Microcline)

Blue Tiger's Eye

Riebeckite (crocidolite variety)

Orthoclase Feldspar

KAlSi3O8 (Potassium Aluminum Silicate)

Amethyst (Quartz)

SiO2 (Silicon Dioxide)

River Rock / Stream Pebble

Fluvial Clast / Rounded Sedimentary Particle