Comparing something that can be had for less than $10 on amazon to a precious gem that often costs in the thousands of dollars seems fallacious to me. Personally, I don't think you're giving MrMoustache a very charitable reading.
Those things arguably have far more intrinsic value, despite also being patently more common; both water and the photosynthetic properties of common vegetation are essential to the survival of the human race, as they have been from time immemorial. Diamonds are valuable only because a) they have subjective aesthetic appeal and b) are artificially scarce. Those are 100% extrinsic qualities - I find nothing hyperbolic about the statement.
I think he was specifically referring to their monetary value. In this context "intrinsic" would imply that the worth, monetary value, whatever, exists only because of artificial or external factors.
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#BLM
#DefundThePolice