How to Fill or 'gloss Over' fairly small Chips in some Stone Sculptures

I bought some arty stone sculptures in Zimbabwe a few years ago.

They were bumped around during a recent move and have nicks and smallish chips. I am looking for a clear filler or gloss-over cream or whatever to renovate them. I've searched the 'net but no luck. Even just the best wording for a narrower internet search or a 'home remedy' would be appreciated.

I would attach an image but can't find a way to do this.

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