ULPT what substance looks very similar to cremation ashes

So long story short, I recently lost my brother. Im going to have him cremated and for some reason, I really want all of him intact in one urn. Some girl who he was seeing ig and and might be pregnant, which my brother might be the father. She asked for some of his ashes which at this point I don't want to give. My mother wants to get in good with her just because she did love my brother etc, i may feel different later but I just wanted to know if something looks a lot like that