Native name: Isla Guarello | |
|---|---|
 Guerello Island seen from Contreras Sound | |
  Guarello Island | |
| Geography | |
| Coordinates | 50°23′S 75°20′W / 50.383°S 75.333°W |
| Adjacent to | Pacific Ocean |
| Administration | |
| Region | Magallanes |
| Additional information | |
| NGA UFI=-883834 | |
Guarello Island (Spanish: Isla Guarello) is an island in Madre de Dios Archipelago in Magallanes Region. Guarello Island is in a limestone area that also includes Madre de Dios Island. The island has the world's southernmost limestone mine and it has reserves for 100 years, and 600,000 tons of limestone with a millesimal fineness of 96% of Calcium carbonate are extracted each year. Half of the production is used in the steel mills of Huachipato which also owns the mines.[1]