Ironstone is a Unique War Hammer in Diablo 2 Resurrected (D2R). This normal Hammer has a quality level of 36 and a treasure class of 27.
IronstoneIronstoneWar Hammer
One-Hand Damage: 38 - 47 to 58 - 72
Durability: 55 of 55
Required Strength: 53
Required Level: 27
Base Attack Speed: 20
+(100 - 150)% Enhanced Damage
+(100 - 150) to Attack Rating
Adds 1-10 Lightning Damage
+10 to Strength
+50% Damage to Undead
Trade items on d2trader.net

How to obtain Ironstone

The fastest way to get this item on Battle.net is via trading, you can use the Item Price Checker to see how much Ironstone is worth.
Farming it by killing monsters is possible, check the drop rate table below for more information.
It can also be gambled but the chances are very slim.

Ironstone drop rate table

The monster with the highest drop chance of dropping Ironstone is Diablo on Normal difficulty in The Chaos Sanctuary of Act 4. Farming the monsters listed below gives you the highest chance of finding that item.

Ironstone variants

Below is a list with different variants of Ironstone. See the stats of its normal, ethereal or upgraded variant.