Hmm, of course I did. I know I'm knew to this, but not that incompetent
Just the back case alone is like 10 grams, and the case itself is decently thick. So, using your calculation: 36 x 75% x $62.57 = $1,689.
I may be off by 1 or 2 grams. The crystal may be thicker and heavier, and not really sure how heavy the tension ring is. I just extracted 3.67 grams from the 39.67 total I got, thinking that should cover it.
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