Mineralological Specimen

Chert (Chalcedony/Agate)

Microcrystalline Quartz (SiO2)

Emerald in Matrix

Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities

Granite

Granite (Mainly Quartz SiO2, K-Feldspar KAlSi3O8, and Plagioclase)

Green Jasper

Silicon Dioxide (SiO2) with iron silicate inclusions

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide inclusions)

Milky Quartz

Silicon Dioxide (SiO2)

Basalt with Quartz/Quartzite Veins

Aphanitic Mafic Volcanic Rock with Siliceous Infillings

Granite

Phaneritic Igneous Rock (composed primarily of Quartz, Feldspar, and Mica)

Chalcedony with Matrix

Silicon Dioxide (SiO2)

Moss Agate

Silicon Dioxide (SiO2) with Manganese or Iron Oxide inclusions

Prehnite

Prehnite (Ca2Al2Si3O10(OH)2)

Puddingstone (Jasper Conglomerate)

Jasper Conglomerate (SiO2 matrix with Fe2O3 inclusions)

Granite (Light-colored quartz/feldspar variety)

Granite (composed primarily of Quartz SiO2 and Feldspar KAlSi3O8)

Yellow Beryl (Heliodor)

Beryllium aluminum silicate (Be3Al2Si6O18)

Crazy Lace Agate

Silicon Dioxide (Microcrystalline Quartz) - SiO2

Rose Quartz

Silicon Dioxide with traces of titanium, iron, or manganese (SiO2)

Crazy Lace Agate

Banded Chalcedony (Microcrystalline Quartz, SiO2)

Puddingstone (Gowganda Tillite/Jasper Conglomerate)

Jasper Conglomerate (SiO2 primary composition)

Carnelian

Carnelian (a variety of Chalcedony) - SiO2

Ironstone Concretion (Boji Stone/Moqui Marble type)

Goethite/Hematite-encrusted Sandstone Concretion

Dendritic Agate

Silicon Dioxide (SiO2) with inclusions of manganese or iron oxides

Rose Quartz

Silicon Dioxide (SiO2) with trace Titanium or Manganese

Chert (Iron-stained or Jasperoid)

Microcrystalline Quartz (SiO2)

Sapphirine in Matrix

Sapphirine (Mg,Al)8(Al,Si)6O20

Amazonite

KAlSi3O8 (Potassium Aluminum Silicate)

Orange Calcite

Calcium Carbonate (CaCO3)

Sugilite

Sugilite (KNa2(Fe,Mn,Al)2Li3Si12O30)

Kunzite (variety of Spodumene)

Lithium Aluminum Silicate (LiAlSi2O6)

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Red Jasper

Jasper (Silicon Dioxide based crypto-crystalline Quartz with Iron inclusions)

Amazonite

Potassium Feldspar (KAlSi3O8)

Chert (Jasper/Agate variety)

Microcrystalline Quartz (SiO2)

Blue Quartz with Dumortierite/Magnesio-riebeckite inclusions

Quartz (SiO2) containing Dumortierite (Al7(BO3)(SiO4)3O3)

Chrysocolla in Malachite

Cu2CO3(OH)2 (Malachite) / Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Chrysocolla)

Dream Amethyst (Chevron Amethyst)

Silicon Dioxide (SiO2) with impurities of Iron (Fe3+)

Clear Quartz

Silicon Dioxide (SiO2)

Granite

Granite (composed primarily of Quartz SiO2, Feldspar (KAlSi3O8), and Mica)

Fossiliferous Chert (Gryphaea Fossil)

Silicon Dioxide (SiO2) with Calcitic Mollusk Remnants

Labradorite

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

Unakite

Epidotized Granite

Magnetite

Iron(II,III) oxide (Fe3O4)