Mineral (Silicate Variety)

Native Copper with Malachite and Chrysocolla

Native Copper (Cu) with Malachite [Cu2CO3(OH)2] and Chrysocolla [(Cu,Al)2H2Si2O5(OH)4·nH2O]

Olivine (Peridot Stone)

(Mg, Fe)2SiO4 (Magnesium Iron Silicate)

Olivine (Peridot)

Magnesium Iron Silicate ((Mg, Fe)2SiO4)

Moonstone

Potassium Aluminum Silicate (KAlSi3O8) with inclusions of Albite

Olivine (Peridotite / Dunite Pebble)

(Mg,Fe)2SiO4 (Magnesium Iron Silicate)

Peridot (Olivine)

Magnesium Iron Silicate (Mg, Fe)2SiO4

White quartz in dark matrix (likely quartz-bearing breccia or polished composite specimen)

Quartz, SiO₂, in an unidentified dark silicate matrix

Moonstone (specifically White Moonstone/Adularia)

Potassium aluminum silicate ((K,Na)AlSi3O8)

Moonstone (Green Moonstone / Garnierite)

Potassium Aluminum Silicate (KAlSi3O8) with inclusions of Garnierite

Almandine Garnet

Iron aluminum silicate (Fe3Al2(SiO4)3)

Olivine (Peridot)

Magnesium Iron Silicate (Mg, Fe)2SiO4

Dumortierite Quartz

Al7BO3(SiO4)3O3 (Aluminum borate silicate)

Olivine/Peridot

Magnesium Iron Silicate (Mg,Fe)2SiO4

Peridot (Gem-quality Olivine)

Magnesium Iron Silicate ((Mg, Fe)2SiO4)

Peridot (Olivine)

Magnesium Iron Silicate (Mg,Fe)2SiO4

Black Obsidian

Volcanic glass (Amorphous silicates)

Petrified Wood

Silicified Wood (primarily SiO2)

Olivine (Peridot)

Magnesium Iron Silicate (Mg, Fe)2SiO4

Snowflake Obsidian

Vitreous volcanic silicate (SiO2 with Cristobalite inclusions)

Mica / Muscovite or Biotite

Phyllosilicate mineral group (e.g., KAl2(AlSi3O10)(OH)2)

Chrysocolla in Jasper (Chryso-Jasper)

Cu2-xAlx(H2-xSi2O5)(OH)4·n H2O (Chrysocolla) + SiO2 (Jasper)

Beach Pebble (Gabbro or Basalt Porphyry)

Mafic Igneous Rock (Porphyritic Basalt / Gabbro)

Chrysocolla

Hydrated copper silicate (Cu,Al)2H2Si2O5(OH)4·nH2O

Epidosite

Epidosite (Metasomatic calcium-aluminum silicate rock)

Likely tumbled quartz or feldspar pebble

Indeterminate; possibly quartz (SiO₂) or potassium feldspar (KAlSi₃O₈)

Small quartz-rich pebble

Quartz (SiO₂), possibly quartzite or weathered granite fragment

Rhodonite

Rhodonite (Mn,Fe,Mg,Ca)SiO3

Green Jasper / Bloodstone

SiO2 (Microcrystalline Quartz)

Quartz Geode Fragment

Silicon Dioxide (SiO2)

Siltstone River Rock

Siltstone (composed of silt-sized particles, silicate minerals)

Moonstone (Tumbled)

Potassium Aluminum Silicate (KAlSi3O8) with inclusions of Albite

Rounded river pebble

Likely lithic sandstone or weathered quartz-rich rock; exact identification requires testing

Rhodonite

Rhodonite (Manganese Iron Magnesium Calcium Silicate) - (Mn,Fe,Mg,Ca)SiO3

Garnet

Silicate mineral group (often Pyrope or Almandine in this color range)

Peridot (rough olivine crystals)

Olivine, chiefly forsterite–fayalite solid solution, (Mg,Fe)₂SiO₄; gem-quality olivine is called peridot

Raw Green Jasper

Silicon Dioxide (SiO2) with iron silicate inclusions

Quartz Vein in Host Rock (Gabbro or Basalt)

Silicon Dioxide (SiO2) with Mafic Silicates

Blue glass-like gemstone specimen (likely dyed or synthetic quartz)

Uncertain; possibly blue-dyed quartz or synthetic glass, not confidently identifiable from the image

Copper-bearing oxidized rock

Likely malachite–chrysocolla with limonite/goethite in a weathered host rock; exact identification requires testing

Olivine (Peridot)

Magnesium Iron Silicate (Mg,Fe)2SiO4

Polished rainbow jasper (likely ocean/imperial jasper)

Microcrystalline quartz (SiO₂) with iron oxides and varied silicate inclusions

Jadeite Jade

NaAlSi2O6 (Sodium Aluminum Silicate)