How are conical stone objects classified in the Harappan civilization?

Lingas

Seals have been examined to reconstruct religious beliefs and practices, with some depicting scenes of rituals while others bear plant motifs associated with nature worship. Some seals portray mythical and composite creatures, including the one-horned animal often referred to as the "unicorn." Figures shown seated cross-legged in a "yogic" posture, sometimes surrounded by animals, have been interpreted as early depictions of "proto-Shiva," an early form of one of Hinduism's major deities. Additionally, conical stone objects have been classified as lingas.