The Roman Catholic Church, issued a clarification about cremation. You can read the entire document at the Vatican website: www.vatican.va The document is entitled: Instruction Ad resurgendum cum Christo regarding the burial of the deceased and the conservation of the ashes in the case of cremation. The highlights of the document are as follows:
1) During the intervening years, the practice of cremation has notably increased in many countries, but simultaneously new ideas contrary to the Church’s faith have also become widespread.
2) In circumstances when cremation is chosen because of sanitary, economic or social considerations, this choice must never violate the explicitly-stated or the reasonably inferable wishes of the deceased faithful.
3) When, for legitimate motives, cremation of the body has been chosen, the ashes of the faithful must be laid to rest in a sacred place, that is, in a cemetery or, in certain cases, in a church or an area, which has been set aside for this purpose, and so dedicated by the competent ecclesial authority.
4) the conservation of the ashes of the departed in a domestic residence (your home) is not permitted.
5) it is not permitted to scatter the ashes of the faithful departed in the air, on land, at sea or in some other way, nor may they be preserved in mementos, pieces of jewelry or other objects.
6) When the deceased notoriously has requested cremation and the scattering of their ashes for reasons contrary to the Christian faith, a Christian funeral must be denied to that person according to the norms of the law.