I recently moved to okc from Texas. I know there's some interoperability, and that Toll Tags are accepted. However, I have a TxTag, similar to a toll tag, but put out by TxDot.
Topaz is commonly used for Friendship Rings and it is nicknamed 'the gem of friendship'. Topaz is considered in some cultures to be the ultimate representation of friendship and fidelity.
Here is what they had to say. 1  GEM Peer Recognition Program: This special peer-to-peer recognition program, which stands for the Going the Extra Mile award (GEM), allows every CoBank associate to award 2 colleagues each year with a $250 (after taxes!) for their hard work and contributions.