It does look Akro to me. I think those would qualify as eyelashes.
Not eggyolk or oxblood though. The only famous bloodied eggyolk I know is the oxblood eggyolk. Like this one: http://marbleconnection.com/topic/23022-oxbloods-show-me-some-please/?do=findComment&comment=207033
I'm not sure what you mean by nesting.
These are definitely Marble Kings, so Marble Kings must be able to nest. I'm just not sure which exact part of the marble you're saying is nesting.
I'm quite jealous of your corkscrew passion. Have I mentioned that this year?
I can't settle. Today I want to settle on black and yellow marbles. But tomorrow I will change my mind.