Fluorite

Crystal system · Isometric

Fluorite is a halide mineral prized by collectors for its exceptional color range, with several world-class Chinese localities.

Museum-quality fluorite twin crystal from Yaogangxian Hunan

Fluorite with purple phantoms and marcasite blades from Inner Mongolia

Front view of rare purple fluorite crystal from Yaogangxian

Purple phantom fluorite cluster with pyrite from Yaogangxian, Hunan

Pale mint-green fluorite cubic crystal cluster, Yaogangxian Mine, Hunan, China

Red fluorite octahedral crystal cluster from Inner Mongolia

Calcium fluoride; cubic crystal habit, a wide colour range.

About Fluoriteextended article

Fluorite is one of the most popular collector minerals in the world — and the single most important Chinese export species. Its perfect octahedral cleavage, sharp cubic crystals, and saturated color zoning have made Chinese fluorite the global benchmark for the last two decades.

Notable varieties

Blue John (banded purple/yellow)
Antozonite (radioactive black)
Chlorophane (thermoluminescent)
Yttrofluorite (Y-bearing)

The Chinese angle

The Yaogangxian Mine in Hunan and the Xianghualing district produce the world's most architecturally perfect fluorite crystals — sharp 5-10 cm cubes with deep blue-green color zoning, often perched on milky quartz or wolframite. Hunan green fluorite is the international reference for top-tier collector grade.

About Fluorite

Fluorite is classified as a halide mineral in the fluorite group and has the chemical formula CaF₂. It crystallizes in the isometric system and is one of the most visually varied minerals in the collector market. Its combination of structural character and global distribution make it a recognized species in both systematic and aesthetic collections.

Identification & care

Specimens usually show cubic, octahedral, cuboctahedral; massive, granular. Its color range is broad, including purple, lilac, golden-yellow, green, colorless, blue, pink, champagne, brown, red, and black. The luster is vitreous, dull, the streak is white, and specimens range from transparent to translucent. The cleavage is perfect octahedral {111}. The fracture is irregular/uneven, which aids identification.

Collector context

How it forms

Fluorite forms in hydrothermal veins, limestone/dolomite replacement, pegmatites. It is commonly found in association with calcite, barite, quartz, galena, sphalerite.

Classic Chinese localities

Shangbao Mine, Xianghualing Sn-polymetallic ore field, and Yaogangxian W-Sn ore field are each a benchmark source for fluorite.

Why collectors care

Collectors pursue Fluorite for the clarity of its crystal form and, in good material, saturated color that reads instantly across a display case. A well-terminated fluorite on clean matrix photographs well, identifies quickly, and anchors a cabinet piece. Top Chinese specimens over the last two decades have reset the bar for what fluorite looks like at collector grade.

What affects value

Value in Fluorite is assessed, in typical order of weight, against: (1) locality provenance; (2) size relative to the species norm; (3) crystal form and termination sharpness; (4) color saturation and zoning; (5) transparency and internal clarity; (6) matrix quality and aesthetic balance; (7) condition (absence of damage, chips, or repair). Cleaning quality and verified locality documentation act as multipliers across the above.

Naming history

The name Fluorite has a specific etymological and historical context — see Mindat's reference entry for provenance details. We have retained naming data at the record level; published prose is paraphrased from factual fields rather than copied from source.