It will not dry out and if the drain needs to be removed at some point, it can be. Glue would make it difficult to work on. Modern 100% silicone caulk will also work, and can be removed easily, like plumber's putty.
Put putty under outer edge of faucet base and fasten to sink. Remove excess putty after fastening faucet.
If it is real marble, the oil in the putty can leach into the marble and discolor it.
No. Use the putty.
You can use silicone as a substitute, but plumbers putty is simpler and far easier to clean up. 100% SILICONE
plumbers
I do not know any specific plumbers, but plumbers at Rescue Rooters are pretty cheap. They work quickly and efficiently and they get the job done on time so you don't have to worry about anything concerning sinks and drains.
Plumbers Putty. An oil based putty that is used to seal sinks and faucets down the the cabinet and between the faucet and the sink. It takes years for it to dry out and it never shrinks or gets completely hard so it keeps a seal and is easy to clean off when something needs to be done with the sink.
Determine where the leak is and fix it. If it is where the drain seal against the sink, take it out and put a ring of plumbers putty around it and reinstall it. Any other connection is going to have a gasket at the joint or it may be that a joint is not tight enough.
Oils from putty soak into and discolor marble. Putty not used when putting pipe together.
The companies that produce copper sink drains is Welders and USink. These two companies are the best in the world at providing quality copper sink drains.
pipes plunger putty
Drains.