Diamond Gemstone Locations: 356 Spawn Points

Diamond Gemstone veins are pinned at 356 spots: 156 in Verteron and 200 in Altgard. Diamond is one of the three gem nodes of Essence Extraction, and gems feed accessories, high-tier potions and soulstones; the item database lists Diamond Gemstone, Fine, Pure and Radiant Diamond Gemstone. For a diamond farm, open your zone's page, look at the area table and start with the area that has the most veins, then loop through the neighbouring areas. In this data the diamond and sapphire layers have the same number of veins per zone, so turning on both gives you one combined gem route. Tick veins off as you go; they respawn later, and other players share them, so an empty vein just means someone was there first.