Black specs on dipstick after oil change

Hello guys,
As title says I dipped my oil after an oil change and there is black specs on the dipstick I have dipped it a few times and there is always a few of these specs. They crush up in to like a powder. Any ideas what it is and should I be concerned? 7F3E6F19-2AAC-4B99-A1FF-2F240E5EA0EB.jpeg
 
could be a bit of old oil crud thats collected in the dipstick tube...

on the next oil change might be best to try and clean it out