1) Mythological object 
Kaustubh (Sanskrit कौस्तुभ:) is a divine jewel or `Mani`, which is in the possession of Lord Vishnu who lives in the Ksheer Sagar - `the ocean of milk`. == Mythology == In Hindu Mythology the Devas and Asuras performed the `Churning of the Ocean of Milk` (Samudra manthan`), in order to get Amrita (Devanagari - अमृत), o...