Kaumodaki
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Kaumodaki is the gadā (mace) of the Hindu deity Vishnu. Vishnu is often depicted holding the Kaumodaki in one of his four hands; his other attributes are the chakra, the conch and the lotus. The gada is also found in the iconography of some of Vishnu's avatars.
Kaumodaki in the right upper hand of a seated Vishnu, medieval sculpture currently in Mathura museum
Kaumodaki as Gadadevi, personified as a woman
Vishnu holds the Kaumodaki in his lower right hand; 5th century.
Panchajanya
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Panchajanya is the shankha (conch) of the Hindu preserver deity Vishnu, one of his four primary attributes. The Panchajanya symbolises the five elements, and is considered to produce the primeval sound of creation when blown.
Iconography of the Panchajanya on a temple wall
Krishna blows the Panchajanya to signal the end of the Kurukshetra War, Razmnama