DAMAN AND DIU
Daman and Diu is a union territory in India. For over 450 years, these coastal enclaves on the Arabian Sea coast were part of Portuguese India, along with Goa and Dadra and Nagar Haveli. Goa, Daman, and Diu were incorporated into the Republic of India on December 19, 1961 by military conquest; Portugal did not recognize the Indian annexation of these territories until 1974. Goa, Daman, and Diu were administered as part of a single union territory until 1987, when Goa was granted statehood, leaving Daman and Diu as a separate union territory; each enclave constitutes one of the union territory’s two districts.
Only Diu Island of the Union Territory contains limestone. The limestone mining, however, is carried out only as a minor mineral. In Daman, basalt is quarried for building and other purposes.