I got two weighted BJ samples from Doug's auction a while back. Interesting chips that show what is beneath the center inlay on at least some of the plastic BJ chips.

I weighed a few chips to see how they compare with the skeleton-chips. The results are below, with all weights from an electronic scale shown in grams.

As you'd expect, the inexpensive chip with no inlay is the lightest as it has no added weighting. I was kind of surprised to see the range of weights for some other BJ plastics though. Apparently, the stainless steel used in the coin-inlays is considerably less dense than the brass slugs.