City of Brass
In the City of Brass, dwarves are literally made of stone. They don’t breed; they are sculpted. The ritual to sculpt a new dwarf requires at least two mature dwarves but often involves as many as a dozen. The sculptors usually maintain a close emotional tie to the dwarves they make. The sculpting process takes over a year to complete, and only skilled stonecarvers can even attempt the ritual.
Once the ritual is complete, the stone comes to life, magically transforming the statue into a humanoid creature with all the usual features: blood, guts, hair, bones, and so on. As such, dwarves are not Constructs. They have the usual statistics of a dwarf as described in the core rules.
Dwarves maintain an appearance like the stone they were carved from. Dwarven sculptors tend to choose a block of stone similar to that from which they were carved. Like begets like. However, sometimes that kind of stone is not available, or the sculptors want to do something unusual. Stone type (that is, skin color) doesn’t exactly map to “race” in dwarves, as it does in humans, but the wealthier dwarven castes have access to better stone, and some dwarven royalty only carve their children out of rare materials (stone or metal). There are golden dwarf princes, alabaster dwarf queens, and jade dwarf empresses.