Llallagua / Siglo XX
Oruro, in the Bolivian Altiplano, is a historic silver–tin district (the San José and Itos mines); the Itos mine is the source of the world's finest franckeite specimens.
About Llallagua / Siglo XXextended article
A historic Bolivian silver–tin district
The Oruro district, in Bolivia's Eastern Cordillera, has been a major silver and tin producer, worked through complex veins in quartz-latite porphyry. The San José and Itos mines are its best-known workings.
What collectors look for
Oruro is celebrated for franckeite (the Itos mine yields the world's best), along with cassiterite, silver sulfosalts, and other tin–silver vein minerals.
Frequently asked questions
Where is Llallagua / Siglo XX?
Llallagua / Siglo XX is a mineral locality in Oruro, Bolivia.
What is Llallagua / Siglo XX known for?
Oruro, in the Bolivian Altiplano, is a historic silver–tin district (the San José and Itos mines); the Itos mine is the source of the world's finest franckeite specimens.
References & databases
Mindat.org is the world’s largest open mineralogy database.