First that was 35,000 total. Assuming you want a
basic Raise Dead, that's 5,000 GP worth of diamonds each casting. If you're worried about Superman's constitution score,
True Res is 25,000 per casting. But that's a 9th level slot too.
That said, probably not. I mean, I'm most familiar with 3.5, but each editions seems to be moving more towards "close all the silly exploits people found in the previous edition". So, I'm guessing even in future editions, all the spells that could make big diamonds for you said as temporary creations of magic, they were unsuitable for spell component use. And the only magic items I can think of that give diamonds, give "A random assortment of gems" and it's not anywhere near 35K. Clerics also don't get a lot of the cool polymorph spells, so you can't even transform other gems into diamonds with Polymorph Any Object.
Best you can hope for using your magic is an excavation of the Elemental Plane of Earth. But given that I'm told it's literally infinite in every direction, is MOSTLY solid rock with only a few pockets of air-space suitable for Prime Material beings, and you could wind up
500 miles off where you were trying to drop, that sounds risky.
Or I guess summoning some
Elemental or Genie or other extra-dimensional entity and trying to get it to get diamonds on your behalf. What a thing like that would demand as
fair payment for such a feat though may be more than you're willing to pay...
EDIT: OK according to
this spell list, that claims to try to keep up with all the spell lists in D&D 3.5, in Races of Eberron Clerics got access to a Transformation Domain, that DOES include "Polymorph any Object".
EDIT 2.0: But THEN I read
Polymorph Any Object in the SRD and it explicitly calls out "gems" as one of the things it can't turn stuff into. So THAT whole tangent was a total waste of time. They REALLY don't want you breaking the In-Game economy with massive amounts of valuable magical stuff out of nowhere.
In fact the only spell I could find that makes valuable items is "
Wish". So if you're serious about this, you're going to want a Ring of Three Wishes, a fully charged Luck Blade, and still decide someone to let stay dead, as that's only 6 big-azz diamonds. You MIGHT get lucky if you use your Artifact on a Deck of Many Things but it's up to you if you want to bet your soul that way on a 2/22 chance of getting something that MIGHT solve your problem versus 11/22 chance of being horribly screwed over. the Gem card says it gives 50 "gems" worth 1,000 GP each. You may or may not get enough of them in diamonds to pay for one or all of it. The Moon gives you 1d4 wishes.
Philosopher's Stone can act as True Res for one body.
Now though you're trying to beat the Justice League without 2 of your magic items and maybe an artifact.