There are at least three colors of the old style H&C (the smaller ones) and three sizes. The newer chips all seem to have the largest size H&C in green.

Inserts on Bud Jones chips will change colors under UV light. It is also useful for spotting counterfeit paper money. Take a look at how regular paper looks compared to real US paper money.

AC folks take a look at your chips, especially the Golden Nugget.