The package includes many different stones including both small shapes and large ones, pre-assembled with the internal polygons removed.
Support, URP and HDRP shaders are here:
Triangles counts:
RockPillarBase_1 - 12698 triangles
RockPillarBase_10 - 4268 triangles
RockPillarBase_2 - 7946 triangles
RockPillarBase_3 - 4706 triangles
RockPillarBase_4 - 6884 triangles
RockPillarBase_5 - 11336 triangles
RockPillarBase_6 - 15392 triangles
RockPillarBase_7 - 10214 triangles
RockPillarBase_8 - 5386 triangles
RockPillarBase_9 - 5128 triangles
RockPillarBG_1 - 55870 triangles
RockPillarBG_10 - 22574 triangles
RockPillarBG_11 - 30200 triangles
RockPillarBG_12 - 53625 triangles
RockPillarBG_2 - 51399 triangles
RockPillarBG_3 - 68791 triangles
RockPillarBG_4 - 92396 triangles
RockPillarBG_5 - 66689 triangles
RockPillarBG_6 - 68335 triangles
RockPillarBG_7 - 31704 triangles
RockPillarBG_8 - 24824 triangles
RockPillarBG_9 - 39472 triangles
RockPillarHG_1 - 127952 triangles
RockPillarHG_2 - 119075 triangles
RockPillarHG_3 - 187593 triangles
RockPillarHG_4 - 125922 triangles
RockPillarSG_1 - 13504 triangles
RockPillarSG_2 - 24044 triangles
RockPillarSG_3 - 14698 triangles
RockPillarSG_4 - 33338 triangles
RP_Pile_1 - 5281 triangles
RP_Pile_2 - 2014 triangles
RP_Pile_3 - 1733 triangles
RP_Splinter_1 - 188 triangles
RP_Splinter_2 - 104 triangles
RP_Splinter_3 - 86 triangles
RP_Splinter_4 - 64 triangles
RP_Splinter_5 - 42 triangles