Jeff:

Here are the weights of some casino chips, in grams. (Even chips in the same set vary a bit because of different formulas for color.)

Some old real table chips:
Aladan Las Vegas $1 chip, (1960s), 10.1 g
Trump Plaza Atlantic City $2.50 (1980s), 10.0 g
Sahara Dunes 25-cent, (1960s) 9.6 g
Resorts International AC $1, (1981) 9.6 g
Playboy Atlantic City $1 coin center (1981), 12.5 g
Playboy Atlantic City $5 coin center (1981), 13 g

Current table chips:
Paulson Dover Downs $1, 9.4 g
Paulson Dover Downs $5, 9.5 g

Retail / home game chips:
Paulson "Classics" on the "Paulson chips" mold: 8.7 g (for the $1,000) to 10.0 g (for the $5 chip)

ASM H-mold blank chips with edge spots, 8.7 to 9.2 grams
ASM "Key West" fantasy chip with insert, edge spots, 8.5 to 9.2 g

TR King "Kings Crown $1" on the small crown mold, 9.7 g

BCC Mardi Gras Casino on the "Suits" mold, 8.6 to 9.3 g

Protege Clay chips, 8.7 t 9.3 grams