The Temple Institute's New Altar

There is an interesting article about the recent completion of the burnt offering altar by the Temple Institute here. What I found most interesting is that it is built with fired brick rather than natural stones. The article notes that the Bible prohibits the use of hand-worked stones (Exod 20:25, cf. Deut 27:5). But this raises the question as to why human made brick, which is not stone at all, would be acceptable. Or why it is not composed of acacia wood and overlaid with bronze as stipulated in Exodus 27:1-8?

 HT: Amy Downey