Same issue, missing Heartgem, can’t complete quest.
Tried resetting quest, doesn’t work, just ends up at same point.
Tried running Amrine again, but there’s no Heartgem for me to collect.
I think they’ve accidentally marked the Heartgem as no longer in use.
Server : Wood Perilous
Character : Fidjt
Same.
Character Name: Shalaleila
World: Calnogor
Region: US East
Mine is missing as well, disappeared as soon as I entered the altar area.
Character: Firekatte
World: Oceana
Region: US East
Same problem.
Character name: Illya Von
World: Pluto
Region: US East
same problem.
character name: Quarryboy
World: Ys
Region: US East
Same – Used the thing before killing the boss and it ate my gem =( now I cannot get another gem and stuck on main story line…
Help Amazon… ffs…
Same issue. No heart gem, no questy…
Name: Captain Kicked
Server: Jiuyou
US East
Same issue … -.-
Name: Iotama
Server: Emathia
Same issue
Name: Sergeantus
Server: Elphame
I wrote to support with this in Friday and still waiting for the answer, but i found topic on forum where issue was this same and someone wrote that support and amazon canto do anythink with this because they cant change somethink on player account. I will wrote again here if they sens me some info. I’ll try to exp another account. I think is only one solution.
Wtf they better not make me lvl another acc to lvl 30 just because their game is dog shit
Yay, I have my Heartgem back! 
I stood in Cutlass Keys Village and reseted the mission twice in a row. And tadaaa: I found a Heartgem in my inventory. Hopefully this was not a coincidence and helps you.
No matter where u stand it works 
im so happy of this shit game xd Thanks one more
You are my lifesavior its actually works guys.
Awesome! I just reset it where I was and it worked - Thankyou!
You’re the boss. Thanks!
Hey folks,
I also hit the same issue going to the alter nothings happens, obviously im missing my heartgem.
Unfortunately resetting the quest didn’t help neither - i don’t see the damned thing in my inventory and the alter is still unavailable. Where exactly did you find your heartgem - in your personal inventory or in any shed in a town? Any suggestions how to fix this? It’s really annoying.
Thanks!
PS. If i go once again through Amrine excavation will it help?
Nothing helps, im stuck there for ages as well
Really its about time you fixing this, its been like this to long, its the freaking MAIN quest
still having this issue, Have reset the mission multiple times but it does nothing. Have had this issue for almost 2 months now, extremely frustrating considering it’s a main quest. It has made me not want to play tbh
Name: Pinot.Boyo
Server: Jiuquan