On our CodyCross answers based website we have the solution for Hardest known gem; the birthstone for April. CodyCross game includes different missions and events which update daily so you can earn tokens that are mostly needed to help with answers for challenging clues. Now let's focus on the answer you need for Hardest known gem; the birthstone for April by scrolling down which is part of CodyCross Gemstones Group Puzzle 2.