Aniconic and Iconic images in Indian Religion

In India, while there are millions of deities, with well-defined forms, there are also aniconic images that are worshiped regularly.

Examples of aniconic images include:

1. Local devtas, typically called devis, bhairavs, peers etc. You see them by the side of the road, with a silver-colored foil and kumkum on them.
2. Saligram (typically found on the bed of Gandaki river in Nepal) - represent Vishnu
   
3. Stones from Vraj - represent Krishna
   
4. Stones from Narmada - Bana Linga - representing Shiva
5. Crafted shivlings
   
6. Fire

(2, 3, and 4 above are considered to have divinity in them, and can be put in a temple, and their pooja started even without consecrating them.)