There are a number of Q&A's on this site that ask "What good is gold in 5th edition?" since the Wealth By Level (WBL) framework is no more. Our first group discovered that as we went up in levels, and needed our castersspellcasters to cast higher level spells, gold was neededrequired to buy spell components for certain spells. (The point on revivify in your question being one that we ran into).
In a subsequent campaign, I have made sure to poolsave up my moneygold and buy a diamond as soon as I could (revivify's cost) and later. Later, I purchased a larger one when our cleric got raise dead as an available spell. Having that attitude - investing in my own raise dead options - has helpedpaid for me to be raised promptly twice now, and another party member as well using(using my spare diamond). (When I can afford to, I carry a pair of 500 GP diamonds. Less encumbrance that way also ...)
If you've got the diamond on your person, anyany cleric with the the spell can cast revivify or raise dead on you. Be Prepared! (Boy Scout Motto)
If you are not always playing with the same group, keeping a diamond handy on your person for that purpose is like buying a life insurance policy. Any Any cleric, PC or NPC, can cast the spell since you have the component ready for them to use.
- For season #8 in particular, ChrisChris Kelly shows why gold pieces are not to be squandered. Casting of spells with expensive spell components has become a financially risky pursuit.
When things go bad, they go bad hard. These are the only Spell Casting Service you can actually go into TCP debt for.
Raise DeadRaise Dead SCS 10 TCPs or 1,000gp available for all Tiers
ResurrectionResurrection SCS 16 TCPs or 1,500gp available for all Tiers
True ResurrectionTrue Resurrection SCS 16 TCPs or 30,000gp available for all Tiers
Dead Character Pays for Raise Dead. Dead
Dead characters that can’t afford the gp the GP cost of the service or treasure checkpoint cost of a spell scroll scroll may incur a treasure checkpoint debt as needed to purchase one. This This debt must be satisfied before treasure checkpoints can be used for for anything else.
You can, but since the material was returned to you, there doesn't seem to be much for a head GM to do in terms of action. That diamond is, as I describeddiscussed above, something like your character's life insurance policy.