First thing first: Meta description is not really a part of the ranking signal (atleast not major if it really have any impact at all) so you have to care more about your audience and how they will react on it instead of the search engines.
Emoji is not a common trend and I haven’t seen any business using this in their description but if your competitors are using and you think your audience will like it, giving it a try won’t hurt you. Make sure you keep a full tack of your CTR to see if the change increase or decrease the CTR and click ratio.
If the results are positive, stick with that, if not move back accordingly.
Just a thought!