Mineral (Silicate Variety)

Green Jasper (Banded Jasper)

Silicon Dioxide (SiO2) with impurities

Chert / Jasper / Agate (Chalcedony Group)

Microcrystalline Quartz (SiO2)

Labradorite (Polished Sphere)

(Ca, Na)(Al, Si)4O8 (Silicate mineral)

Ruby in Kyanite

Corundum in Disthene (Al2SiO5 + Al2O3)

Rhodonite

Rhodonite ((Mn2+,Fe2+,Mg,Ca)SiO3)

Obsidian

Obsidian (Volcanic Glass, complex silicate)

Serpentinite-bearing quartz vein rock

Serpentinite (antigorite/lizardite) with milky quartz; possible chlorite or epidote alteration

Amazonite

Potassium aluminum silicate (Microcline); KAlSi3O8

Weathered quartz-rich pebble

Likely granitic or feldspathic clast; chiefly quartz (SiO₂) and feldspar

Chondrite Meteorite Fragment

Ordinary Chondrite (L or H type)

Rose Quartz Sphere

Silicon Dioxide (SiO2)

Greenish translucent mineral fragment

Indeterminate; possibly serpentine, epidote, or green glassy feldspar

Lepidolite and Rubellite (Pink Tourmaline) in Quartz

K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 (Lepidolite) and Na(Li,Al)3Al6(BO3)3Si6O18(OH)4 (Elbaite/Pink Tourmaline)

Green Jasper

Silicon Dioxide (SiO2) with impurities

Copper-bearing rock, likely native copper in matrix

Native copper (Cu), possibly with cuprite/iron-rich matrix

White Topaz

Aluminum Silicate Fluoride Hydroxide, Al2SiO4(F,OH)2

Quartz-Veined Gneiss or Metamorphic Rock with Quartz Veins

Quartz-veined metamorphic rock (Silicate mineral assemblage)

Graphite-bearing schist (probable)

Graphite schist; chiefly quartz, mica, and graphite

Milky Quartz

Silicon Dioxide (SiO2)

Howlite (tumbled stone)

Howlite, Ca₂B₅SiO₉(OH)₅

Howlite

Howlite (Ca2B5SiO9(OH)5)

Green Jasper

Silicon Dioxide (SiO2) with mineral inclusions

Blue Quartz (Aventurine)

Silicon Dioxide (SiO2) with inclusions of Dumortierite or Magnesio-riebeckite

Greenstone / Serpentinite

Serpentinite (complex of Mg, Fe, Ni, Al, Zn, Mn silicate minerals including Antigorite, Lizardite, and Chrysotile)

Mixed rock and mineral collection

Multiple specimens; visible pieces may include quartz, calcite, agate/chalcedony, jasper, and dyed or coated materials

Bumblebee Jasper

Calcite with Arsenic and Sulfur inclusions

Gypsum (variety Selenite or Alabaster)

Calcium sulfate dihydrate (CaSO4·2H2O)

Picture Jasper

Silicon Dioxide (SiO2) with iron oxide and clay inclusions

Sillimanite

Al2O3(SiO2)

Rhodonite

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

Tumbled river stones (likely quartzite, jasper, and chert)

Varied silicate rocks, chiefly quartzite (SiO₂), jasper/chert (microcrystalline SiO₂)

Garnierite in Matrix

Nickel-bearing Magnesium Silicates (Garnierite)

Polished brecciated jasper

Jasper, opaque microcrystalline quartz (SiO₂), likely brecciated jasper with iron-oxide and dark silicate inclusions

Native copper-bearing rock

Native copper (Cu), likely with copper oxides/carbonates in a host rock

Green Common Opal

Hydrated Silica (SiO2·nH2O)

Aragonite (Onyx Marble)

Calcium Carbonate (CaCO3), Orthorhombic crystal system

Amazonite (Microcline Feldspar)

K(AlSi3O8) - Potassium Aluminum Silicate

Moonstone

Orthoclase (Potassium aluminum silicate - KAlSi3O8)

Banded Gneiss

Gneiss (Metamorphic silicate rock)

Weathered dark volcanic rock, likely basalt

Basalt; fine-grained mafic silicate rock dominated by plagioclase and pyroxene, commonly with olivine

Small tan rock fragment

Indeterminate; possibly quartz-rich sandstone or iron-stained quartz

Chrysocolla

Chrysocolla; (Cu,Al)2H2Si2O5(OH)4·nH2O