SUPER RARE TRANSPARENT CLEAR BLUE AKRO AGATE ONYX CORKSCREW NM+/- .613″ 6B/40

i have several of these up, the other ones on ebay are not as clear (the blue glass)  as these are
SUPER RARE TRANSPARENT CLEAR BLUE AKRO AGATE ONYX CORKSCREW NM+/- .613″ 6B/40
COMBINED 
SHIPPING 
COMBINED 
SHIPPING 
COMBINED 
SHIPPING
I DO MY BEST TO ACCURATELY IDENTIFY ALL MARBLES, BUT 
EVEN SELF-PROCLAIMED MARBLE EXPERTS SAY THEY ARE UNSURE OF WHAT TYPE A MARBLE IS AT TIMES
MARBLE SIZES:
     
PEEWEE
= under .5”
inch
MIB
= ½ inch-.685”
SHOOTER
= .69” – .9”
BOULDER
= .95”- 1.20”
JUMBO
= 1.25”-1.65”
SUPER JUMBO
= 1.7”-1.9”
TOE BRAKER
1.95” AND UP
“+/-” means more or less
Mint:
 
A marble that is in original condition.The surface is unmarked and undamaged. There may be some minor rubbing on the surface, howeve
r
, the marble is the way it came from the factor
y
Near Mint
:
 A marble that has seen minor usage. There may be evidence of hit marks, usually tiny to small subsurface moons, pinprick chips, tiny to small flakes or tiny to small bruises. The damage does not detract from viewing