Here you can find a lot of scraped rocks meshes and few optimised pregathered meshes. Package keeps five full pbr set of textures, size is 4096x4096.
Triangles counts:
ClawCrackedRock1 - 4410 triangles
ClawCrackedRock2 - 1512 triangles
ClawRock1 - 3598 triangles
ClawRock10 - 2788 triangles
ClawRock11 - 3342 triangles
ClawRock12 - 2390 triangles
ClawRock13 - 2424 triangles
ClawRock2 - 5460 triangles
ClawRock3 - 3810 triangles
ClawRock4 - 3300 triangles
ClawRock5 - 5194 triangles
ClawRock6 - 2062 triangles
ClawRock7 - 2176 triangles
ClawRock8 - 1686 triangles
ClawRock9 - 2136 triangles
ClawRockBase0 - 1742 triangles
ClawRockBase1 - 2068 triangles
ClawRockBase2 - 3550 triangles
ClawRockBase3 - 4686 triangles
ClawRockBase4 - 5762 triangles
ClawRockS1 - 2172 triangles
ClawRockS2 - 860 triangles
ClawRockS3 - 664 triangles
ClawRockSmall1 - 136 triangles
ClawRockSmall2 - 174 triangles
ClawRockSmall3 - 308 triangles
ClawRockSmall4 - 1118 triangles
ScrapedRockGath1 - 4804 triangles
ScrapedRockGathB10 - 12868 triangles
ScrapedRockGathB13 - 5219 triangles
ScrapedRockGathB14 - 10814 triangles
ScrapedRockGathB7 - 12153 triangles
ScrapedRockGathB8 - 11203 triangles
ScrapedRockGathB9 - 12146 triangles
ScrapedRockGathN11 - 8963 triangles
ScrapedRockGathN2 - 11682 triangles
ScrapedRockGathN4 - 11136 triangles
ScrapedRockGathT15 - 7667 triangles
ScrapedRockGathT3 - 6387 triangles
ScrapedRockGathW12 - 19515 triangles
ScrapedRockGathW5 - 9481 triangles
ScrapedRockGathW6 - 10667 triangles