easiest material is from the fall near Gibeon, south Africa, hence
the material is called “Gibeon”. although i am not attending Tucson
this year, expect to pay $0.75-$1.25 / gram.
I incorporated some of this material, cut as a cab, into a
ceremonial breastplate. I avoided using my standard cabbing
equipment, the composition of this meteorite has about 8% nickel, so
you don’t want to grind it on a conventional lapidary grinding wheel,
which has diamond nickel plated onto the wheel, as the nickel from
the meteorite bonds to the nickel on the diamond, stripping the
diamond off of the wheel.
so, trim the material to your approximate size using a jewelers
metal wire saw, then shape using a coarse file. To show the best
internal pattern, finish with 400# sandpaper, then etch 20 seconds
with a 2% nitric acid, neutralize with baking sodaurn and coat with
wd-40. a finish any finer than 400 grit and you lose the pattern.
you can vacuum sputter gold onto the surface, and although i have
not tried it, you should be able to coat with a layer of 24k gold,
aka Kumboo, by burnishing gold foil (0.001’ thick) onto the meteorite
at 600 deg F.