help id this on my live rock

[dbt2002]

These tiny black hard things in translucent material appeared on my rock - new tank finished cycling a few weeks ago. Any idea what this is? Good/bad? Thanks in advance...

 

[ZANYMASTER]

I would of given the rocks a good scrub before putting it in but looks fine

 

[MDreef]

Probably fine and Likely something decaying. What does it feel like to touch and can you scrape it off or doesn?t come off easily? You say it just appeared?

If you can take out the rock and smell it, if it smells like rotten eggs it could be a hydrogen sulfide deposit or if deeper in likely some metal sulfide...