Looks like clay IMO, probably fired ?? The reason for the glass like sound when tapped together ?? I have seen them before but can't quite put my finger on what they belong to ??
Here's the pic westcoast_Dave posted on AAM of the PPP's Migbar (Mike Barton, R.I.P.) dug @ the old Peltier site, I'll leave the link also.
LINK : https://www.allaboutmarbles.com/viewtopic.php?f=7&t=46816
"Welcome to Marble Connection Lain"
I agree w/ Art on the transparent aqua colored one being a slag marble. As far as the others, definitely made in some kid of mold or pressed together, no idea what they are composed of and my guess would also be game pieces. Hang in there, someone more than likely will know what they are.
"Again Welcome"
Almost never see the RWB or PWY mibs, plus these box sets all came w a pee wee. Still an orig. box & bag & in great shape. Seems to be a rash of these Popeye box sets recently but this is one of the nicer ones IMO
LINK : https://www.ebay.com/itm/225057474770?hash=item34667888d2%3Ag%3ACpcAAOSwOoBiwTX6&mkevt=1&mkcid=1&mkrid=
Is the base glass opaque, transparent or translucent ?? It's the right colors for an Akro cork, I can't really make out the cork pattern though ? Can you backlight or under light it ??
Have fun Brother !!
LINKS: https://oldraremarbles.com/product/light-amber-corn-husk/
#1. https://www.google.com/search?sxsrf=ALiCzsaGQErLcmzoqWON87RefNAheb_lzg:1656884590339&source=univ&tbm=isch&q=pictures+of+a+German+cornhusk
LIN K : https://www.worthpoint.com/worthopedia/marbles-11-16th-vintage-german-cornhusk-marble
One of my favorite "wall hanger Curios" full of dug Heaton for this "Sundays Best" I used some Akroware to hold part of the mibs in, 90% of these were mis shapen i.e. footballs, pancakes, double ingot, barbells etc.