Genesis 1:3 were produced a little over 800 years before the bricks referred to in Exodus 5:7.

The logical conclusion as to the type of bricks that were used would be mud-bricks in both

verses. It is unlikely that an advanced way of making bricks would have been forgotten,

although it is possible especially considering the confusion that happened during the construction

of the Tower of Babel. The entire project was abandoned by God as he changed the people's

languages and dispersed them to different locations. The people who were scattered may very

well have known why God scattered them and would not ever attempt to build such an edifice

again, thereby negating the need to make the same type of bricks again. This is one possibility

among many, but the evidence weighs heavier toward the idea that mud bricks were used in both

verses.

 In the book of Isaiah, the prophet says that Ephraim and the inhabitant of Samaria, in the

pride of their heart said, "The bricks have fallen down, But we will rebuild with smooth stones;

the sycamores have been cut down, but we will replace {them} with cedars" (Isaiah 9:10 NASB).

Bricks must have been in common use in the time of Isaiah which was around 800 B.C. Since

Ephraim wanted to replace the brick with the hewn stones, which are much more costly to make,

it can be assumed that the stones were stronger than brick. Since modern day bricks are almost

as solid as a rock there would be no need to tear down bricks to build with stone. This being the

case, it would seem logical that the bricks in Isaiah's day were not nearly as strong as kiln fired

bricks of today.

 Clay

 There are two Hebrew words for clay, tit and homer. Tit, rendered "mire", or "mud", for

the fine deposit left from the evaporation of water (Psalm 69:14; Jeremiah 38:6) or in the sense

of clay for bricks or pottery (Isaiah 41:25, 57:20; Nahum 3:4; Unger 1988). The Hebrew word

"homer" is properly translated clay for bricks or pottery (Isaiah 29:16; 45:9; Jeremiah 18:4). In