Deepslate ores in survival

I was wondering, what if it was possible to get deepslate coal emerald and copper in survival? And my idea is to use the smithing table! By combining a regular ore with a piece of deepslate, it creates the deepslate version of that ore. This would be purely decorative as (So far) the deepslate ores don't have any difference besides being able to be mined slower, so i figured why not do this? Obviously you would still need to find the ores with a silk touch pick, but i figured this would be a way to get them outside of creative.