petrifact

plural petrifacts

1. An object made of stone, especially one formed from petrifaction.

   The whole scene was littered with petrifacts of different sizes and kinds, enormous trees, weighing tons, bared of their branches, overthrown and turned to stone.

   1974, Lawrence Durrell, Monsieur, Faber & Faber, published 1992, page 132

   1 more example

   Her long hair, whiter than snow at normal times, had been combed out neatly and tied at the back. Illuminated by the sunlight, it was no longer like snow—but a petrifact, a diamond.

   2016, Yuu Kamiya, translated by Daniel Komen, No Game No Life, volume 4