Old Kaleidoscope block

I thought this was very interesting-
Barbara Brackman has a lot of information on her blog.

I drafted a block and pieced it by the foundation method. 

Three  diamonds make a large hexagon.

You can see that it is made from 3 diamond shapes

The main design element is the black.

Use any colour, any shape for the other fabrics, but the middle piece(the black in this case) should be the same in every block.

Here is a link to a web site showing an antique quilt
made with this method,

Kaleidoscope Quilt