What it is confused with
Amethyst, green glass and other soft stones. Fluorite often splits into neat eight-sided octahedra along its cleavage.
Purple, green, blue, yellow, often banded
Fluorite crystal meaning
Fluorite is calcium fluoride (CaF₂), purple, green, blue, yellow, often banded, rated 4 on the Mohs scale. Traditionally, it is associated with concentration, sorting priorities and mental order — attributed, not demonstrated.
- Mohs hardness
- 4 window glass scratches it
- Crystal system
- Cubic CaF₂
- Main sources today
- China also Mexico, UK (Derbyshire)
Properties
Composition
Calcium fluoride (CaF₂)
Hardness (Mohs)
4
Crystal system
Cubic
Color
Purple, green, blue, yellow, often banded
Mined in
China, Mexico, UK (Derbyshire), USA, Namibia
Worth knowing
Fluorescence is named after this mineral — many specimens glow blue-violet under ultraviolet light.
History
Blue John fluorite has been mined in Derbyshire since at least the eighteenth century; the popular story that the Romans worked it has no firm evidence.
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Buying
Buying Fluorite: fakes, value and treatments
What decides the price
Color banding and clarity; purple-and-yellow Blue John from Derbyshire is the rare collector variety.
Where it is used
Fluorite is used as a flux in steelmaking — the name comes from the Latin for "to flow" — and in high-quality camera and telescope lenses.
A less familiar fact
The word fluorescence was coined from fluorite, which glows under ultraviolet light.
Practical
Caring for Fluorite
How to clean it
Warm soapy water, no ultrasonic. Soft at 4 and cleaves in four directions.
How to tell it is real
Genuine fluorite usually fluoresces blue-violet under UV — the mineral gave fluorescence its name. Glass imitations do not.
How hard is Fluorite?
Fluorite defines 4 on the Mohs scale and cleaves in four directions, so even a light knock can flake it. It is a display stone more than a jewelry stone. Among the stones in this reference, the next softer is Malachite (3.5–4) and the next harder Obsidian (5–5.5).
Fluorite, at 4, is harder than 5 of the other 42 stones here and softer than 37.
Traditional associations
Fluorite is traditionally associated with concentration, sorting priorities and mental order. Chakra in crystal practice: Third Eye, Heart. Element: Air.
Questions about Fluorite
What is Fluorite made of?
Calcium fluoride (CaF₂), crystallizing in the cubic system.
Where does Fluorite come from?
China, Mexico, UK (Derbyshire), USA, Namibia.
Can Fluorite be worn every day?
Not in a ring. At 4 on the Mohs scale it is better kept for pendants, earrings or display, away from knocks, because it cleaves in four directions.
Cite this page
AstroHot. “Fluorite Crystal Meaning: Properties, Hardness and Origins.” Accessed October 28, 2026. https://astrohot.com/crystals/gemstones/fluorite/
For Wikipedia
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