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.
If you choose to upgrade a friend to Platinum Elite, all you'll need is your friend's IHG Â® Rewards Club member number (or have them sign up at ihg.com/rewardsclub if not already a member), and we'll instantly upgrade your friend to Platinum Elite.