The Shamir-Worm, used to make it, was Created on Day 6 of Creation, at Sunset: Pesachim 54a
The Rim [Zer] around it: Yuma 72b
The term "Tiharo Shel Mizbayach" for the Top of the Altar: Yuma 59a
Height of the Altar [in the Tabernacle]: Shabbat 92a
The size of the cubit used in measuring the altar: Eruvin 4a
Placement of the Altar in relation to the walls of the Inner Room: Yuma 59a; Sotah 14b
Power of the Altar for Attaining Forgiveness: Ketuvot 10b
What "prepares" the altar for each day's service: Menachot 49a, 50a
The incense of public offerings is brought on the Internal Altar: Menachot 50a-b
Whether gold which had been used for a prostitute's fee may be used for the foil coating the altar: Temurah 30b
Spreading salt on the surface of the altar's ramp to keep people from slipping, on Shabbat: Eruvin 104a