I have been reading Bloss, Wahstrom et al and trying to learn some
crystallography, especialliy at a microscopic or barely visible
For example, what if you are prospecting and find barely visible
crystals in an ore body which is 40% or more olivine with pyroxene in
the second spot and they flash a lot of light at noon-day sun? IMO it
is reasonable to find out if they are diamonds.
Would a diamond anvil tell you? Otherwise what is the lowest cost
method for diamond determination at this size?
Wahlstrom of course refers to the polarizing microscope for “thin
slices” but what about tiny crystals as above? What do you think the
De Beers Lab at U Alberta uses?
PS - Would wurtzite boron nitride be a stronger material to
substitute in a diamond anvil? As we determined in that thread last
year, ALL crystals will pass light if small/thin enough. So if lasers
can penetrate the WBN, the laser-temperature tests can be done though
maybe WBN is not as heat-resistant as diamond.
Bloss gives 5 main parameters plus sub-parameters for crystal
"COHESIVENESS" which I expect is what you need in a diamond anvil. He
does not rank-order crystals (like diamond or nephrite) for
cohesiveness total score.