So .....

[intuit]

These are some of my faves. Had them forever. They're just standard size. But I have a peewee one with some awesome colors. Will post it later

 

[intuit]

Sorry about the dust. I haven't had these out for a minute

[Ric]

The first looks like it might be a hand-made of some sort - the pictures are a bit out of focus so it's hard to tell. The others look like JABOs to me.

[Chad G.]

X2

[Alan]

You camera is unable to focus that close.  Back up the camera until the marble comes into focus.  Look up how to do a manual center focus select.  Also, pics taken on a black background will always come out dark, as the exposure averages on the background unless you choose what part of the image to focus on.