Pyrite
Pyrite — Metallic Lustre and Natural Crystal Forms
Pyrite is a sulfide mineral composed of iron and sulfur. Its brassy yellow colour and metallic lustre gave it the nickname “fool’s gold”, though its properties differ greatly from those of gold.
It occurs as cubic crystals, other crystal forms and aggregates. Its geometric shapes can form naturally, without cutting or polishing.
Mineralogical Properties
| Property | Information |
|---|---|
| Mineral | Pyrite |
| Group | Sulfides — pyrite group |
| Main chemical composition | Iron disulfide — FeS₂ |
| Colour | Brassy yellow, sometimes darkened or with oxidation colours |
| Lustre | Metallic |
| Hardness | 6–6.5 on the Mohs scale |
| Specific gravity | Approximately 5.0 |
| Transparency | Opaque |
| Crystal system | Cubic |
| Resistance to impact | Brittle |
| Streak colour | Greenish black to brownish black |
These are reference values, rather than measurements of an individual specimen.
Pyrite and Gold — Similar Appearance, Different Properties
Pyrite is harder and more brittle than gold. Gold is relatively soft, ductile and malleable, whereas pyrite tends to break under pressure.
Golden colour alone is insufficient for identification. Crystal form, lustre, specific gravity and other material properties are also examined.
Pyrite and Marcasite
Pyrite and marcasite have the same chemical formula, FeS₂, but different crystal structures. They are therefore separate minerals despite their shared composition.
Caring for the Specimen
Some pyrite specimens may undergo oxidation and deterioration, particularly in high humidity. Keep the specimen dry and avoid soaking it in water.
New powder, crumbling or a significant surface change warrants examination of the specimen’s condition and storage environment.
Sources Around the World
Pyrite is widespread worldwide. Familiar crystal sources include Spain, Peru and Italy, including Navajún in Spain and the island of Elba in Italy.
Spiritual and Symbolic Meaning — Beliefs and Traditions
The name pyrite comes from the Greek word for fire, because sparks can be produced by striking it.
It is also known as the Illusion Stone. On the one hand, it helps its user to notice a pretense, i.e., to expose the illusion. But at the same time can cause the user to sink into delusions of his own. Thus self-awareness is important when using pyrite.
Where there are hard energies, it provides an energetic protective cover. It provides grounding and thus is suitable for the flighty.
It helps lead to emotional balance, and is therefore suitable for treating anxiety and depression.
Pyrite also helps create a feeling of material and emotional abundance. It strengthens willpower, and helps to choose between what is important and what is trivial.
It provides strong protection and therefore is suitable for people who are in a dangerous environment.
These meanings belong to the realm of belief and symbolism. They can give jewellery personal significance, but they are not proven gemological properties or a promise of healing, protection or a change in health.