Mineralological Specimen

Chert (Chalcedony/Jasper)

Microcrystalline Quartz (SiO2)

Gold in Quartz Matrix

Native Gold (Au) with Quartz (SiO2) and Slate/Shale

Shale with Plant Fossils / Carbonaceous Shale

Laminated Mudrock (Siliciclastic)

Rough Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Basalt with Vesicular Texture (Beach Cobble)

Vesicular Basalt (Aphanitic Igneous Rock)

Granite Pegmatite with Tourmaline and Muscovite

Pegmatite (Feldspar: KAlSi3O8, Quartz: SiO2, Schorl: NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH))

Sandstone (Micaceous)

Arenite (composed primarily of SiO2)

Fossiliferous Limestone

Calcium Carbonate (CaCO3) with Bioclastic Inclusions

Granitic Pegmatite with Biotite

Pegmatitic Granite (contains KAlSi3O8, SiO2, K(Mg,Fe)3AlSi3O10(OH)2)

Quartz Geode (River Cobble)

Silicon Dioxide (SiO2)

Chalcedony Nodule (Commonly known as Agate or Chert)

Microcrystalline Quartz (SiO2)

Bicolor Quartz Pebble

Silicon Dioxide (SiO2) with mineral inclusions

Gold Ore

Auriferous Quartz and Sulfide Mineralization in Host Rock

Quartzite with Quartz Vein

Quartzite (SiO2)

Ferruginous Chert

Microcrystalline Quartz (SiO2) with Iron Oxides

Granite (Pink/Potassium-rich)

Phaneritic Plutonic Felsic Igneous Rock (primarily SiO2 with KAlSi3O8)

Quartz Pebble

Silicon Dioxide (SiO2)

Fossiliferous Chert with Brachiopod Impression

Chert (SiO2) containing Brachiopoda fossil remains

Ruby (Corundum)

Corundum (Aluminum Oxide with Chromium), Al2O3:Cr

Green Quartzite (Aventurine variety)

Silicon Dioxide (SiO2) with inclusions of Fuchsite

Chert (Jasper variety)

Silicon Dioxide (SiO2)

Gneiss (specifically a weathered Amphibolite or Garnet Gneiss)

Gneiss (complex silicate composition)

Labradorite

(Ca, Na)(Al, Si)4O8 (Plagioclase Feldspar)

Quartzite

Quartzite (primarily SiO2)

Hematite

Iron(III) oxide (Fe2O3)

Labradorite

Labradorite ((Ca,Na)(Al,Si)4O8)

Basalt (Weathered/Tumbled)

Extrusive Mafic Igneous Rock

Clear Quartz

Silicon Dioxide (SiO2)

Druzy Quartz on Vesicular Basalt

Silicon Dioxide (SiO2) in an extrusive Mafic igneous host rock

Chert (specifically Flint or Gray Chert)

Silicon Dioxide (SiO2)

Gold Ore in Quartz

Native Gold (Au) in Quartz (SiO2)

Sandstone with Algae Growth

Arenite with Chlorophyta/Lichen

Jasper with Hematite inclusions

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3)

Basalt with Quartz Veining

Basalt (Mafic Extrusive Igneous Rock) with SiO2 (Silicon Dioxide) veins

Chert (Arrowhead Preform or Flake)

Microcrystalline Quartz (SiO2)

Ruby in Fuchsite

Corundum (Al2O3) in Chrome-Mica (KAl2(AlSi3O10)(OH)2)

Granite Cobble

Granite (Felsic Plutonic Rock)

Chert (specifically Chalcedony/Flint variant)

Silicon Dioxide (SiO2)

Granite Cobble

Felsic Intrusive Igneous Rock

Pyrite in Matrix (Fool's Gold)

Iron Disulfide (FeS2)

Chert Pebble

Microcrystalline silica (SiO2)

Honey Calcite

Calcium Carbonate (CaCO3)