What was the form of the Prophet's (peace and blessings be upon him) minbar and from what was it made, and is it the one currently found in the Mosque of Medina or near the Kaaba?

The Messenger of Allah's (PBUH) minbar had three steps and was made of tamarisk wood. The original prophetic minbar has since burned down and no longer exists. In Sahih Muslim, Sahl ibn Sa'd narrated that a woman sent her carpenter to the Messenger of Allah (PPUH), and he made for him a minbar with three steps from tamarisk wood. The Messenger of Allah (PBUH) prayed on it so that people could follow him and learn his prayer.