I’m not sure that real diamonds would survive blending since hardness isn’t everything. Another important factor is how brittle a substance is–and diamonds, while hard, are fairly brittle (which is how they are faceted by gem smiths along cleavage planes) while steel, which is somewhat softer, is relatively ductile and will not readily fracture. If you have a few million dollars lying about we can settle this once and for all… according to a user…

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