Mineral (Silicate Variety)

Greenstone (Greenschist facies)

Greenschist (composed primarily of Chlorite, Actinolite, and Epidote)

Olivine (often within Peridotite)

Magnesium iron silicate, (Mg,Fe)2SiO4

Weathered iron-rich metamorphic rock, likely schist or quartzite

Provisional identification: ferruginous quartzite or mica schist; composition likely quartz (SiO₂), iron oxides/hydroxides, and mica or clay minerals

Feldspar (Potassium Feldspar / Orthoclase)

KAlSi3O8 (Potassium Aluminum Silicate)

Jasper with Quartz Vein

Silicon Dioxide (SiO2)

Mixed polished gemstones and minerals

Likely agate/chalcedony (SiO₂), quartz, jasper, and possibly aventurine or obsidian; exact identification requires individual testing.

Jasper with Quartz Vein

Silicon Dioxide (SiO2) with impurities

Gray foliated metamorphic rock, likely gneiss or schist

Quartz–feldspar–mica metamorphic rock; exact identification requires a fresh surface and testing

Mixed Quartz and River Pebbles (Stone Collection)

Mixed assortment containing mainly Silicon Dioxide (SiO2)

Yellow Jasper

Silicon Dioxide (SiO2)

Orthoclase Feldspar

KAlSi3O8 (Potassium Aluminum Silicate)

Talc (Soapstone variety)

Talc (Hydrated magnesium silicate) - Mg3Si4O10(OH)2

Diorite

Diorite (Intermediate intrusive igneous rock)

Feldspar (specifically Orthoclase)

Potassium Aluminum Silicate (KAlSi3O8)

Jadeite (Jade)

NaAlSi2O6 (Sodium Aluminum Silicate)

Snakeskin Agate

Agate (Cryptocrystalline Quartz, SiO2)

Feldspar (specifically Orthoclase)

Potassium Aluminum Silicate (KAlSi3O8)

Banded Jasper / Yellow Jasper with Chlorite or Epidote inclusions

Silicon Dioxide (SiO2) with iron oxide and silicate impurities

Green Beryl (Emerald variety)

Beryllium aluminum silicate (Be3Al2Si6O18) with Chromium/Vanadium impurities

Mixed Mineral Bead Bracelet

Polycrystalline and Monocrystalline Silicates/Oxides (Quartz, Howlite, Hematite)

Red Jasper

Silicate (SiO2 with Hematite impurities)

Polished/tumbled jasper, likely ocean jasper or brecciated jasper

Jasper: microcrystalline quartz (SiO₂) with iron oxides and other silicate impurities

Green Jasper

Silicon Dioxide (SiO2) with iron and silicate inclusions

Jasper (Multi-color Chert)

Silicon dioxide (SiO2)

Jasper with Quartz Vein

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Green Jasper

Silicon Dioxide (SiO2) with iron silicate inclusions

Imperial Topaz

Aluminum silicate fluoride hydroxide (Al2SiO4(F,OH)2)

Picture Jasper

Silicon dioxide (SiO2)

Orange glassy slag (industrial by-product)

Iron-rich silicate glass; composition varies, commonly Fe–Ca–Al silicate

Feldspar (specifically Orthoclase)

Potassium Aluminum Silicate (KAlSi3O8)

Rhodonite

Manganese Silicate (Mn,Fe,Mg,Ca)SiO3

Picture Jasper

Jasper (Silicon Dioxide, SiO2 with impurities)

Olivine (Peridot)

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

Common Opal (Potch)

Hydrated Silica (SiO2·nH2O)

Serpentine (likely polished serpentine-rich rock)

Serpentinite; predominantly serpentine-group minerals (lizardite, antigorite, chrysotile), commonly with magnetite and minor chlorite/talc

Green Jasper

Silicon Dioxide (SiO2) with impurities of iron(II) silicate

Ferruginous Sandstone (with possible trace fossils)

Arenite with Iron-Oxide Cement (SiO2 with Fe2O3)

Slag

Anthropogenic Vitreous Silicate / Ferro-silicate Slag

Yellow Jasper (Chert)

Silicon Dioxide (SiO2) with iron inclusions

Red garnet cabochon ring

Garnet-group silicate, likely almandine–pyrope solid solution (X₃Y₂(SiO₄)₃)

Common Opal (Green Opal / Pistachio Opal)

Hydrated silica (SiO2·nH2O)

Red Garnet

Pyrope or Almandine (Silicate group, X3Y2(SiO4)3)