Diamond ore clusters

Diamond ore should commonly generate in clusters, These clusters would be a collection of some nodes that would generate 1-4 blocks from each other. Each node would be 1-2 diamond or lapis ore, lapis nodes being dud ones but still having the opportunity for another node to generate from it. 

This would add learning and strategy to mining, as well as expand on the mining experience, a small amount of diamonds becomes an event and an opportunity rather than just 1 and done. you have the choice to stop and search around for another set of ore.