Diamonds in Minecraft are primarily found underground as diamond ore blocks, which spawn between levels 1 and 15, with the highest concentration typically between levels 5 and 12 in older versions, and around level -59 in newer versions (1.18 and later)

. To find them, you need to dig deep underground, usually near the bottom of the world, and mine the diamond ore with an iron pickaxe or better to obtain diamonds

. Besides mining, diamonds can also be found as loot in chests located in various structures across the Minecraft world, including:

• Abandoned mineshafts
• Desert temples
• Jungle temples
• End cities (after defeating the Ender Dragon)
• Villages (in weaponsmith and toolsmith chests)
• Bastion remnants in the Nether
• Shipwrecks
• Woodland mansions (in secret rooms)

These locations offer alternative ways to acquire diamonds without mining deep underground

Summary of where to find diamonds in Minecraft:

• Mining diamond ore: Between Y-level 1 and 15, best around levels 5-12 or near Y -59 in newer versions
• Loot chests in structures: Mineshafts, temples, end cities, villages, bastions, shipwrecks, woodland mansions
• Tools required: Iron pickaxe or better to mine diamond ore successfully

This combination of deep underground mining and exploring specific structures is the most reliable way to gather diamonds in Minecraft