Is this a quilt block?
 

I seem to recall something like this that I did a longtime ago. Do you recognize it?

surely could be a quilt block. i found one similar called Iberian Tiles by Catherine Redford. not exact though.
also these https://www.fieldguidetoquilts.com/7...RecWoven.shtml

It could be a Celtic Knot block variation.

https://www.generations-quilt-patter...ilt-block.html

Set on point. I used it for a project a few years ago. Looks great alternated with another fabric.

It reminds me of a mosaic table top I made.

I think that's what I need. thanks!

Most definitely a Celtic knot variation. It is not difficult to take this design and make it into a quilt block.
EQ 7 or 8 or Quilt Pro are the best bet for making the changes.

It does look like a Celtic knot pattern. With St. Patrick's day coming up you may find it on Pinterest. Or sometimes if you google the Celtic knot pattern this picture will come up