India is home to one of the oldest granite formations in the world, dating back 3.6 billion years, found in Tamil Nadu’s Tirunelveli district. India’s Andhra Pradesh state has the largest deposits of slate in the world. The iconic Taj Mahal’s white marble was sourced from Rajasthan’s Makrana region.India is the world’s 2nd largest producer of natural stones, accounting for over 20% of global production.