As per (Hari Bhakti Vilasa 5/257 from Skanda Purana , 258/259 From Srimad Bhagvatam 11. 27. 12-14) a Shaligram Shila with Golden flow on a Shaligram Shila will represent the Nector that came out after the Samundra Manthan. These Shilas are very few on this Universe as where ever the drop of Nector fell, the Shaligram Shila has absorbed that nector and same as become golden flow and emerged out from the Shila. This Shila is Samundra Manthan Shila. There will be several Akrutis of various Devetas and Demaons and the 14 Ratnas that emerged out during this churing of ocean that can be seen on the Shaligram Shila. The Shila blesses the devotee with spiritual enlightenment and rejunivation of positive energies and discarding of negative energies. This enlightens the consciousness like the wave of Ocean. It gives tremendous concentration and stability in thoughts like Mandara mountain. Vasuki represents the desires and we need to control our desires. The poison represents the difficulties, sufferings and pain in life and worshipper comes out of these difficulties by Karma Yog, Gyan Yog, Dhyan yog and Bhakti yog. Lord Shiva symbolises the will to take everybodys responsibility on ones shoulders, the awakening of Super Conciousness. Dhanvantri symbolises the good health and longitivity. The Nector symbolises the achieving of ultimate goal, the Salvation and Laxmi represents the universal enrichment and wealth to do good and selfless servive to others.