Thank you Chelle and Lin!
They are not hypertufa pots Chelle, I only made one once many years ago, but got inpatient as it took so long for it to harden out.
They are made in cement, white and yellow sand and when still fresh I rubbed in some dirt for encouraging moss and algae growth that gives them the weathered and natural look. I like pots to make unity with the plant instead of standing out by itself.