PBR Diamond Ore Block Test
I generated the texture maps in photoshop and adjusted them in Substance alchemist. Afterwards I exported the material into Substance Painter to made sure they worked with the 3D model. Finally, I added lights and rendered the scene in Marmoset Toolbag 3.
2019: Test / Practice
Maps used to create this material:
I did another quick material test, this time with the Block of Iron: