No I mean Blue - Blue ribbons, w/ no shades of black. The only place I've seen a real good one is in Sami's book on pg. 145 in the aventurine section, blue ribbons loaded w/ blue av. I believe you have the book, take a peek @ 145.
Not mine, I think it was Ron's ??
Smore from AAM ::
https://www.allaboutmarbles.com/viewtopic.php?f=5&t=51150&p=368876&hilit=peltier+white+slags#p368876
I've always heard the same and seen many examples of both. Supposedly Akro bricks don't have the distinct 9 pattern like most MFC along w/ the lack of white in the base ?? Just what I've been told and seen, so mostly an opinion.
Not positive of the one on the (L) but the other 3 are Pelt Rainbos, the hole (blowhole) are unfortunately a common trait on Pelts. Which has me leaning Pelt on that one also. Can you get a pic of the seams on the one on the left ??
Not seeing Heaton fawn or black cherry, OP looks more like a slag than anything IMO ??
MC LINK :: https://marbleconnection.com/topic/26001-named-heaton-types/
AAM LINK to named Heaton types :: https://www.allaboutmarbles.com/viewtopic.php?f=5&t=46247&hilit=named+Heaton&start=25
Both links are almost identical, Chuck S. @cheese posted them on both forums.
Heaton Black Cherry has an opaque white base
Heaton Fawns