Dvaraka
The legendary city of Dvaraka in Hindu history was the dwelling place of Krishna. Dwarka or Dvaraka is derived from 'Dwar', a door, and in ancient times its flourishing port was considered to be the gateway to the main land. As 'Ka' means 'Brahma' meaning gateway to Moksha (salvation). It is also called Dwarkamati and Dwarkavati or Dvaravati. The famous Nageswar Jyotirlinga near Dwaraka is made of a large Dwaraka Sila.
The Hindu scriptures prescribe that stones obtained from Dvaraka only for worship even though geologically it may be found in other places too.
Read more about this topic: Dvaravati Sila