Hey! A longtime fan of the mod here. One of my friends made a suggestion about being able to combine heartstones for ease of access, since we play on a roleplay server where certain people typically have about 3-9 heartstones in their inventory at a single time, so I am just writing this to help give some other ideas for it since it would be a feature I also would enjoy :D Here's a picture of my friend's inventory for example, just to visually explain why we were excited by the idea:

Mine is certainly not as organized as hers, so for me, carrying around 5 heartstones, I begin to struggle a lot with inventory management.

-The first idea would be some sort of heartstone container that would be able to fit multiple heartstones in it at once, it could act as a bundle or even as a sort of backpack for them. heartstones would still function properly inside of the container, so people could still ping the heartstone to find you if you had it in this container, and you could easily open the heartstone container to remove the one that you need if you wanted to ping another person.
-The second idea (which was my friend's idea I think) was combining different ID heartstones so that everyone who had a corresponding heartstone could still ping the combined heartstone in your inventory. I preferred the container idea simply because i am not sure how a combined heartstone would function, for example, would you ping everyone else at once if you used the heartstone, would it only ping one person, or would you have to cycle through a list of IDs trying to find the one that corresponds with the person you want, etc. (We typically name the heartstone in an anvil by the name of the other person who has it so we can see easily who it will ping, but i am not sure how this would work for the last option)

My other friend also submitted a suggestion about these things and possible curios support as well :o As of now, you can place a heartstone in the charm slot, but the heartstone isn't functional. are there any plans to implement support for that?

I really don't know much about what goes into making a minecraft mod, these are just some ideas that we thought could help improve our experience with the mod, so I hope I didn't offend! I am not sure if it's needed, but we run the mod on 1.20.1 Forge. Thank you for making this mod, and I hope that you have a good day.