Sijes is a small town which services a borate mining district. Borate beds intercalated with clays, tuff and sandstone of the Sijes Formation. In part buried under sediments washed down from the western flanks of the Sierra de Sijes.
The borate beds here constitute the world's largest deposit of hydroboracite. Ref: Journal of Sedimentary Research, Volume 70, N° 3, p 664 to 681.
Mineral list contains entries from the region specified including sub-localitiesMineral List:31 entries listed. 9 valid minerals. 1 type locality (valid mineral).
Localities in this Region:
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!
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