Civil Code (Cap. 16), article 578

578. Where any person has, for the purpose of producing a thing of a new species, made use of materials partly belonging to him, and partly belonging to others, in such a manner that, alt hough neither the materials of the one nor those of the other have be en entirely transformed, such materials cannot, nevertheless, be separated without injury, the thing shall belong in community t o both owners in such shares as correspond to the value of their respective contribution, that is, in regard to the one, to the value of the materials which belonged to him, and, in regard to the othe r, to the value of the materials which belonged to him and the price of the workmanship. Where workmanship is much more valuable than materials.