Necklace artifacts assembling do not count towards these 2 badges:
www.glitch.com/achievements...
www.glitch.com/achievements...
As per staff :«Since the game is ending, this wouldn't be a type of bug we could fix...»
They only count towards this one:
www.glitch.com/achievements...
But I have reconstructed 5 necklaces and still no badge...and yes they were all reconstructed after the badges came out.