mineral
Mixed Mineral Assortment (Pyrite, Kyanite, Agate, Jasper)
FeS2 (Pyrite), Al2SiO5 (Kyanite), SiO2 (Agate/Jasper)
Mohs hardness varies by specimen (Pyrite: 6-6.5, Kyanite: 4.5-7, Quartz varieties: 7). Colors range from brassy yellow (pyrite) to blue (kyanite) and earthy reds/browns (jasper). Luster is metallic for pyrite and vitreous/pearly for the silicates.
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Physical properties
Mohs hardness varies by specimen (Pyrite: 6-6.5, Kyanite: 4.5-7, Quartz varieties: 7). Colors range from brassy yellow (pyrite) to blue (kyanite) and earthy reds/browns (jasper). Luster is metallic for pyrite and vitreous/pearly for the silicates.
Formation & geological history
Formed in various geological environments including hydrothermal veins, metamorphic rocks, and sedimentary deposits over millions of years.
Uses & applications
Commonly collected as mineral specimens, used in decorative items, jewelry, and educational displays.
Geological facts
Pyrite is famously known as 'Fool's Gold' due to its metallic luster and pale brass-yellow hue which resembles gold.
Field identification & locations
A diverse collection of common semi-precious and mineral specimens easily found in rock shops and various geological localities worldwide.
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Arenite (SiO2 based)
sedimentary
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Regolith / Silicate Mineral Aggregate
sedimentary
Limonite / Goethite (Iron Ore Mineral nodule)
FeO(OH)·nH2O / FeO(OH)
mineral
Schist
Schist
Metamorphic
Septarian Pebble
Septarian nodule / Concretion
sedimentary
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
mineral