Dwarka meaning the kingdom or place of lord krishna situated in india The oldest name of dwarka is dwarwati or dwarvati meaning ,the gate to heaven or way to krishna home.
Lord krishna is king of dwarka so he is known as dwarkadhish. The auspicious stone Found here in Dwarka river is known as Dwarka shaligram or dwarkas silas.
According to Puran,The worship of dwarka shaligram along with shaligram and gomati chakra is very auspicious.
Dwarka saligram is direct symbol of lord krishna himself. Worshipping it pleases lord krishna. There are many chakra(mark wheel) or hole like structure in dwarka shaligram. These chakra is known as sudarshana(the emblem of krishna).
Dwarka shaligram is available in various shape and size. It have many chakra on it. And some have very few chakra on it.
Dwarka shaligram worship pleases lord krishna easily. Tulsi leaves is kept every day above dwarka sila and shaligram on worship time.
Worship of dwarka shaligram, Gandaki river shaligram attain all kinds of happiness,and pleasure in life. And finally attain krishna loka(vaikuntha) at time of breath leaving.
The nature of dwarka shaligram is that,it sink in water. Whereas stone found in ram setu (rameshwaram) looks similar as dwarka shaligram which float in water. Rameshworam saligram represent lord ram. whereas dwarka shaligram is krishna. Both this shaligram pleases ram krishna(lord vishnu).