That's right! A doily surrounded by tile pieces. Don't they make a fine combination? The maker of this block was pleased with the look of it, but noted that the edges of the doily would have to be securely stitched to the background fabric if she were going to have someone machine quilt it for her.
Another workshop participant pieced and fussy cut one of the circles in her block to give this great mirror image effect:
And how about these paisley orange peel shapes?