I might suggest that you reach out to Steve Arnold, or Geoff Notkin. You may remember these fellows as the “Meteorite Men.” Both Steve & Geoff are specialists in meteoritics, particularly when it comes to Pallasites. You may recall their recoveries & findings of several Brenham, KS Pallasites a few years back. I might also suggest microscopy as a convenient & easy way to identify the Peridot crystals. They should have show shock deformation features, as in ‘shock, or impact melt.’ The NiFe, which holds & shrouds the Peridot, would also show as Neuman Lines, or as the better-known Widmanstatten pattern, where the components of Ni, Taenite & Kamacite, merge through short or extended heating & cooling. Most of your Pallasites exhibit the Widmanstten pattern, but not all, as not all meteorites are constructed of the same fabric. An inexpensive Ni Test is also an option, as some “fakes” might use solder, or something similar to stain glass construction. Chances of this happening are slim, but where there is money to be had, who knows what a dealer will do.
I hope these suggestions are helpful.