The Honey Onyx. It is treated as one of the holy grails of Peltiers.
Someone will post a glorious multi-shaded translucent-based Peltier and will be hoping it is a honey onyx, because everyone wants to find one, right? The response will be, "No, that's not one, keep trying." Then that marble which is so much prettier than an actual honey onyx will be brushed under the rug without any of the oohing and aahing that it deserves.
Here's mine. Another of the forgotten treasures I have found in my attic while searching for marbles to give away to the neighbor child. You have many many "just rainbos" which are prettier, don't you!
(Yes, it is one. 11/16+. Has the expected green line, though faint. It has a frosty face, so it's only a place holder, but it is Gino-Biffany-Approved. )