Huanggang Mine
Curated by Maggie Liu · Updated:
The Huanggang Mine (黄岗梁) in Hexigten Banner, Inner Mongolia, is one of the world's premier modern collector localities — the global benchmark for lustrous black ilvaite, green hedenbergite, and andradite garnet from an iron-tin skarn.
About Huanggang Mineextended article
A world-class skarn locality
Huanggang is an iron–tin (Fe–Sn) skarn deposit in Hexigten Banner, Inner Mongolia. Since large-scale specimen recovery began in the 2000s it has become one of the most important collector localities of the modern era, prized for the exceptional quality and variety of its skarn minerals.
What Huanggang is known for
- Ilvaite — sharp, lustrous black prismatic crystals among the world's finest
- Hedenbergite — radiating green sprays
- Andradite garnet, magnetite, and fluorite
- Arsenopyrite, datolite, babingtonite, calcite, and quartz
Collector value
Combination pieces — ilvaite or hedenbergite perched on quartz, fluorite, or calcite — are especially sought after. Crystal sharpness, metallic-to-vitreous lustre, and freedom from damage drive value; the best ilvaite specimens set the standard for the species.
From Our Sources
Huanggang is a modern locality — large-scale specimen recovery only began in the 2000s — and the reason it matters to collectors is variety: ilvaite, hedenbergite, andradite, magnetite, fluorite, arsenopyrite, datolite, babingtonite, calcite and quartz all come out of the same Fe–Sn skarn. We grade combination pieces on whether both species are actually well formed, not just present.
All natural, untreated material, photographed as the exact piece, with every species on a combination specimen named on the label rather than lumped as "and associated minerals".
Frequently asked questions
What is ilvaite, and why is Huanggang's famous?
Ilvaite is a calcium–iron silicate that forms sharp, lustrous black prismatic crystals. Huanggang's are among the world's finest, which is the main reason the mine became one of the most important collector localities of the modern era. See the ilvaite reference for the species data.
What is a skarn, and why does it produce so many species?
A skarn forms where hot mineralising fluids react with carbonate rock, and that reaction produces a wide assemblage rather than one or two minerals. Huanggang is an iron–tin skarn in Hexigten Banner, Inner Mongolia, which is why one deposit yields ilvaite, hedenbergite, andradite garnet, magnetite, fluorite, arsenopyrite, datolite, babingtonite, calcite and quartz.
Why are combination pieces worth more?
Because both halves have to survive. A single well-formed crystal is a matter of one growth going right; a combination piece needs two or more species that each grew cleanly, sat together in a good arrangement, and then came out of the ground undamaged. At Huanggang the ilvaite-with-hedenbergite and fluorite combinations are the ones collectors chase.
Where is Huanggang Mine?
Huanggang Mine is a mineral locality in Inner Mongolia, China. It lies at approximately 43.5500°N, 117.4500°E.
What minerals are found at Huanggang Mine?
Signature minerals from Huanggang Mine include Andradite, Magnetite, Fluorite, Arsenopyrite, Datolite, Babingtonite. The locality lies in Inner Mongolia, China, and each mineral links to a full reference entry with formula, crystal system, and collector notes.
What is Huanggang Mine known for?
The Huanggang Mine (黄岗梁) in Hexigten Banner, Inner Mongolia, is one of the world's premier modern collector localities — the global benchmark for lustrous black ilvaite, green hedenbergite, and andradite garnet from an i…
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