Alien Blood Diamonds is a intel document in Resistance: Retribution.
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This murky pool made it hard to see shite barely three feet in front of my face, yet somehow a glint caught my eye. It was so bright I should have been able to see it from above the surface. But I didn't. After zeroing in on the light source, I found a pulsating jewel embedded in the cave wall. Looked like an emerald, but those only reflect light, and there was no light down here to reflect. This jewel glowed like the radioactive crystals I found in Bonn, but unlike those, this was cool to the touch. I broke the nugget off the wall, and stashed it for LaSalle.
-- Journal Entry, 06 September, 1951 -- James Grayson