In the consideration of micro thermal behavior the XRD is one of the suitable method for studied of isotropic crystal
and for un-isotropic based on mineral d-spacing and intensity could study changing atomic structural of kaolinite crystal.
Do not under any circumstances consider purchasing an isotropic crystal
with a refractive index of any other than 2.
Should you wish to smuggle these isotropic crystals
around the world, this microscope pen will allow you to tell the difference between diamonds and the pieces of pretty glass which trick many a damsel into a rogue's embrace.