Goa was once a major exporter of which mineral?

Bauxite is a mineral used to make aluminum. Goa has some bauxite deposits, but they are not as large as the iron ore deposits. Limestone is a mineral used to make cement. Goa has some limestone deposits, but they are not as large as the iron ore or bauxite deposits. Silica sand is a mineral used to make glass. Goa has some silica sand deposits, but they are not as large as the iron ore, bauxite, or limestone deposits.

In conclusion, Goa was once a major exporter of iron ore. The state has rich deposits of iron ore, which is used to make steel. Iron ore mining was a major industry in Goa until it was banned in 2018 due to environmental concerns.