Recently downloaded the 1.6.1v update which includes quartz. However when I enter an old save I cannot find any
However when I create a new world and travel to the nether it appears everywhere.
As indicated, the game will not overwrite terrain that has been already generated with new terrain. So, any overworld terrain that has been already generated in your old world will not have emeralds. For nether quartz, however, you can reset your entire nether... causing an entirely updated nether to generate with the quartz in it. You will, however, lose any builds you have made in the nether by doing this.
However when I create a new world and travel to the nether it appears everywhere.
Any pointers on what to do?