What it is confused with
Gold and marcasite. Gold is soft and leaves a gold streak; pyrite is brittle and leaves a greenish-black one. Most "marcasite" jewelry is actually pyrite.
Brassy metallic yellow
Pyrite crystal meaning
Pyrite is iron sulphide (FeS₂), brassy metallic yellow, rated 6–6.5 on the Mohs scale. Traditionally, it is linked to enterprise, initiative and material confidence — attributed, not demonstrated.
- Mohs hardness
- 6–6.5 scratches window glass
- Crystal system
- Cubic FeS₂
- Main sources today
- Spain also Peru, Italy
Properties
Composition
Iron sulphide (FeS₂)
Hardness (Mohs)
6–6.5
Crystal system
Cubic
Color
Brassy metallic yellow
Mined in
Spain, Peru, Italy, USA, Russia
Worth knowing
Known as fool's gold, but it grows in near-perfect natural cubes — a shape so precise it is often mistaken for carved. It degrades in humidity, so keep it dry.
History
The Greek pyrites lithos meant "stone of fire" — struck against steel it throws sparks.
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Buying
Buying Pyrite: fakes, value and treatments
What decides the price
Inexpensive; sharp natural cubes, such as those from Navajún in Spain, are prized by collectors.
Where it is used
Struck against steel or flint it throws sparks, and it was once a source of sulfur for sulphuric acid.
A less familiar fact
Pyrite can slowly decay in damp air, releasing acid that damages mineral collections — a problem collectors call pyrite disease.
Practical
Caring for Pyrite
How to clean it
Dry cloth only. Keep dry — pyrite degrades in humidity and can crumble.
How to tell it is real
Called fools gold for good reason, but the reverse confusion is easy to settle: pyrite is brittle and shatters, gold is malleable and dents. Pyrite also grows in natural cubes.
How hard is Pyrite?
Pyrite is hard enough for jewelry but chemically unstable: damp air slowly breaks it down, so keeping it dry matters more than guarding it from scratches. Labradorite and Moonstone share its place on our scale. Among the stones in this reference, the next softer is Opal (5.5–6.5) and the next harder Tanzanite (6–7).
Pyrite, at 6–6.5, is harder than 14 of the other 42 stones here and softer than 26.
Traditional associations
Pyrite is traditionally linked to enterprise, initiative and material confidence. Chakra in crystal practice: Solar Plexus. Element: Fire.
Questions about Pyrite
What is Pyrite made of?
Iron sulphide (FeS₂), crystallizing in the cubic system.
Where does Pyrite come from?
Spain, Peru, Italy, USA, Russia.
Can Pyrite be worn every day?
With care. At 6–6.5 on the Mohs scale it can be worn often, but watch out for humidity, which makes it decay.
Cite this page
AstroHot. “Pyrite Crystal Meaning: Properties, Hardness and Origins.” Accessed October 28, 2026. https://astrohot.com/crystals/gemstones/pyrite/
For Wikipedia
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