Fluorite – Crystal Wiki
The colorful mineral with cubic crystals – a classic for specimens
Fluorite (CaF2)
Properties & Characteristics
Scientific Data
- Chemical Formula
- CaF2
- Crystal System
- Cubic
- Mohs Hardness
- 4
- Density
- 3.0–3.3 g/cm3
Physical Properties
- Color
- Violet, green, blue, yellow, or colorless; often zoned
- Luster
- Vitreous
- Transparency
- Transparent to translucent
- Special Feature
- Often fluorescent under UV light
What is Fluorite?
Fluorite is a calcium fluoride and one of the most popular collector's minerals. Strong colors and sharp crystal edges are particularly prized.
Formation
Fluorite forms primarily in hydrothermal veins, often together with lead and zinc ores.
Deposits & Market
Important regions where it is found include China, Mexico, Spain, and England. In trade, intensely colored pieces with a clean matrix are particularly sought after.
Quality Characteristics
Color saturation, transparency, crystal formation, and overall aesthetics of the specimen are crucial.
Care & Handling
Clean gently, protect from impacts, and do not use hard brushes.
Frequently Asked Questions
Why does fluorite glow under UV?
Due to trace elements and lattice defects that cause fluorescence.
Is fluorite durable?
Only to a limited extent, as fluorite is relatively soft and susceptible to scratches.
Is fluorite suitable for rings?
Only conditionally for everyday jewelry; it is much more suitable as a collector's item.