Mineral (Gemstone)

Rough White Zircon

Zircon (Zirconium Silicate, ZrSiO4)

Mixed Gemstone and Mineral Collection

Mixed Silica and Carbonate minerals (SiO2, CaSO4·2H2O, etc.)

Clear Quartz (Rock Crystal)

Crystalline Silicon Dioxide (SiO2)

Rhodochrosite

Manganese Carbonate (MnCO3)

Rhodochrosite

Manganese carbonate (MnCO3)

Amber

Amber (C10H16O)

Amber

Succinite (Fossilized Resin)

Pearl

Organic gemstone (Calcium carbonate - CaCO3)

Amber (Rough Baltics/Beach Specimen)

Succinicum (Organic Gemstone - Fossilized Resin)

Epidote

Epidote (Ca2(Al2,Fe3+)AlSi3O12(OH))

Rhodochrosite

Manganese Carbonate (MnCO3)

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

Turquoise

CuAl6(PO4)4(OH)8·4H2O

Quartz (Pink / Ferruginous)

Silicon Dioxide (SiO2)

Quartz Crystal Matrix

Silicon Dioxide (SiO2)

Quartz with Iron Staining

Silicon Dioxide (SiO2)

Unidentified pale yellow-green mineral/rock fragment

Possibly sulfur-bearing mineral, serpentine, or weathered limestone; exact identification requires testing

Chrysocolla

Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Hydrated Copper Phyllosilicate)

Green Aventurine and Clear Quartz Bracelet

Quartz variety with Fuchsite inclusions (Aventurine) and pure Silicon Dioxide (SiO2)

Banded quartz-rich rock (possibly pegmatite)

Likely quartz–feldspar pegmatite; identification is tentative from the photo

Milky Quartz

Silicon Dioxide (SiO2)

Orthoclase Feldspar

KAlSi3O8 (Potassium Aluminum Silicate)

Diamond (appearing in jewelry)

Diamond (pure Carbon, C)

Mixed gemstone jewelry collection

Various gemstone minerals, including likely amethyst (quartz), sapphire or iolite, garnet, pearl, turquoise, and colored beryl or tourmaline

Diamond (or Cubic Zirconia simulant)

C (Carbon) or ZrO2 (Zirconium Dioxide)

Jasper

Silicon dioxide (SiO2) with impurities

Garnet in Matrix

Almandine/Grossular Garnet in Pegmatite or Schist

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Small polished dark mineral or gemstone fragment

Indeterminate; possibly smoky quartz, obsidian, or dark tourmaline

Sunstone

(Ca,Na)((Al,Si)2Si2)O8 (Plagioclase Feldspar)

Sunstone (Feldspar variety)

(Ca,Na)(Al,Si)4O8 with Hematite or Goethite inclusions

Diamond in Gold Setting

Diamond (C - pure carbon)

Rhodochrosite Pebble

MnCO3 (Manganese Carbonate)

Epidote

Calcium aluminum iron silicate (Ca2(Al, Fe)3(SiO4)3(OH))

Epidote

Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))

Rhodochrosite

Manganese Carbonate (MnCO3)

Aventurine Quartz

Quartz with fuchsite inclusions (SiO2)

Epidote

Epidote - Ca2(Al2,Fe3+)3(SiO4)3(OH)

Quartz (Clear Quartz/Rock Crystal)

Silicon Dioxide (SiO2)

Rhodochrosite

Manganese Carbonate (MnCO3)

Jadeite and Assorted Corundum (Ruby/Sapphire) / Beryl (Emerald)

Jadeite (NaAlSi2O6), Ruby/Sapphire (Al2O3), Emerald (Be3Al2(SiO3)6)