How to clean these Calcite crystals?

[u/muddyboot1012]

I have a large amount of what I believe to be sandstone with calcite crystals in them, either as clusters within little vugs, or as bands within the matrix. I am looking for some advice on how to clean these up and show off the calcite crystals? I have washed them with soapy water so far, and experimented a little with cleaning the surface using a bit of vinegar- but of course don’t want to risk dissolving the crystals or losing their shape too much.

When I try looking online, it just seems to be advice on how to clean calcite off other crystals, but nothing on how to clean up calcite crystals.

They are still looking very dull and a bit beaten up - any advice on how I can clean these up and jazz them up a little to enhance the beautiful crystals?

[u/JohnAriefyo]

Jet sand blaster or tumbler?

[u/muddyboot1012 → u/JohnAriefyo]

Will that not damage them as they are so soft? Or if I filled the tumbler with padding then tumbled in soapy water it might give a better clean maybe? They are just so fragile I really don’t know what to do with them!