Originally posted by Anonymous ATS
Some were made in a southern German village in the late 1800's as bases for crucifixes.

Yech... the effect would evoke a feeling of the Macabre
rather than the the Lord's sacrifice.
i realize that the crucifixion site was Golgotha (the skull)
but a clear crystal, human skull, in the round, is way too wrapped in
diabolical symbology to have a mix of a cross & a skull for normal Christians... of any era.
i recall that the 10 or so skulls, range in size from 4" to as big as 10",
some more detailed, but all are viable candidates for gazing or scrying practices... or exactly the opposite of mainstream religion based on faith &
beliefs.
PS: a different array of 'tools' would be needed if one were to Grow the crystal skulls rather than sculpt and polish them