Need Help Identifying Eggs

[Ielliah]

I noticed that there are some egg like things on a couple peices of my live rock. Some of them are purple and some are whitish. The rock has been in my tank for about 5 weeks and I just recently added a clown and a black spiky urchin. The eggs are smaller than 1mm in diameter and are in tight rows of about 10-30 eggs. Anyone have any ideas? (I took some photos but they didn't turn out very well.)