NALGONDA: A polished stone axe made of black basalt from the Neolithic period, dating back to around 4000 BCE, was found at Gundrampalli in Chityal mandal. The prehistoric stone tool, measuring 15 ...

Each stone, with its unique shade ... orange, lilac, black, and, of course, the iconic pink. These varieties include: Basalt, by contrast, is a dense volcanic rock formed by the rapid cooling ...