From what I understand the polished limestone is accurate for many pyramids, but the gold pyramidion seems to be more of an edge case on some smaller pyramids.

A gold top wouldn’t even be visible from the ground on a large polished white pyramid.

CarPlay/Android Auto doesn’t require a modem in the car. Your phone already has a modem in it.

I thought this would be a mammogram?

I wonder if it’s not so much the density/opacity, but rather refraction. Significant difference in density meaning diffraction, and we’re seeing the comparatively dark sky refracted through the exhaust plume?