Quick note about Diamonds (posted in another thread):

A diamond on other nodes are just a BASIC_TRANSFER transaction type, which is used to simply transfer $DESO from one wallet to another. Other apps, most of which are forked from BitClout's original code written 4-5 years ago, use the more simpler implementation of Diamonds and can keep it the way it is as they are relatively simpler in scope than an app like Focus.

"Diamonds" on Focus are different because it supports multiple currencies in your wallet so you can have $DESO, $USDC & $FOCUS. Eventually it will support $ETH, $BTC and $SOL too (this means I can tip you in $ETH for example).

This is a much more advanced use-case, and uses Associations and Atomic Transactions to send, giving the application layer more scope.

This makes it flexible for reasons like if most users want to stake their $DESO but still want to tip or pay for things with another currency, which also gives $FOCUS more utility + a revenue model. Or if they want to quickly stable up to $USDC in times of volatility for example.