objects/Props/materials/physics/physics_stone.usda

#usda 1.0
(
    defaultPrim = "Stone"
    metersPerUnit = 1
    upAxis = "Z"
)

def Material "Stone" (
    prepend apiSchemas = ["PhysicsMaterialAPI"]
)
{
    float physics:density = 2850
    float physics:dynamicFriction = 0.7
    float physics:restitution = 0.1
    float physics:staticFriction = 0.7
}