Everything is Textured and modelled on C4d / Redshift
Post in After effects.
Model of the seashell

The rocks asset are scatter on the surface of a terrain by a global matrix with a random position / rotation to make the sand

The texture is generated procedurally with redshift. The texture is a blend of greyscale noise maps to drive the refraction intensity and color of the amber to create different shades. And a sprinkle of caustics !