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Naica, Mun. de Saucillo, Chihuahua, Mexico
This page kindly sponsored by Peter Megaw

Latitude: 27°51'N
Longitude: 105°30'W
 
 
Some caves are famous for giant gypsum crystals (up to 14 m in length!), among them "Cave of Swords" in the Gibraltar Mine, and "Cave of Crystals" in the Naica Mine.

Note that the upper level oxide workings of the Gibraltar, Maravillas, Lepanto etc. Mines were incorporated into the Naica Mine in the mid-1950s and although names like Gibraltar Shaft survive within the Naica Mine, these old names no longer bear any relation to the current workings (now dominantly well below the 500 m level). Pretty much any specimen mined since the 1950s...except for crystals taken from the Cave of the Swords (and most of the gypsum crystals that have come out in that period came from caverns other than the Cave of the Swords) should be simply labeled Naica Mine, Naica, ... etc.

Distinctive sharp gypsum crystals on a dark brown hard limestone matrix come from the Chubasco Breccia Body, probably a collapsed solution cave/pipe. Chubasco lies at the end of a long exploration heading driven to chase a geophysical anomaly. There was no ore present and the drift was closed off permanently.

Mineral List

Mineral list contains entries from the region specified including sub-localities
Actinolite
Andradite
Anhydrite
Arsenopyrite
Baryte
Bournonite
Calcite
var: Iceland Spar
var: Manganoan Calcite
Celestine
Chalcopyrite
'Chlorite Group'
Conichalcite
Copper
Cosalite
Covellite
Cuprite
Diopside
Dolomite
Epidote
Fluorite
Galena
Goethite
Grossular
Gypsum
var: Selenite
Hedenbergite
Jamesonite
Linarite
Malachite
Matildite
Mimetite
Molybdenite
Pyrite
Pyrrhotite
Quartz
Rutile
Scheelite
Siderite
Sphalerite
Vesuvianite
Wollastonite
Wulfenite


61 entries listed. 39 valid minerals.

Localities in this Region

Mexico
Mexico

The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

- Fisher, R.D. (2006): Die grössten Gipskristalle der Welt: "Crystal Cave of the Giants" in Naica, Mexiko. LAPIS 31 (11), 33-36. (in German)


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Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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