Is it possible, by RAW/RAI, to create an adamantine weapon that also has the "silver" property, e. g. an adamantine weapon with a layer of silver or something similar?

There's a silversheen magic item that would overlay the adamantine property, but the weapon would not be considered adamantine while it is in effect.

Only other option I can think of is a double weapon with each end made of different materials.

So, no, not really.

Is it possible, by RAW/RAI, to create an adamantine weapon that also has the "silver" property, e. g. an adamantine weapon with a layer of silver or something similar?

Special Materials: "If you make a suit of armor or weapon out of more than one special material, you get the benefit of only the most prevalent material."

Silver, Alchemical: "The alchemical silvering process can't be applied to nonmetal items, and it doesn't work on rare metals such as adamantine, cold iron, and mithral."

I believe that the new property overwrites the old one, so no. You could use weapon blanch, but it's quite short lived

Weapon Blanch: These alchemical powders have a gritty consistency. When poured on a weapon and placed over a hot flame for a full round, they melt and form a temporary coating on the weapon. The blanching gives the weapon the ability to bypass one kind of material-based damage reduction, such as adamantine, cold iron, or silver. The blanching remains effective until the weapon makes a successful attack. Each dose of blanching can coat one weapon or up to 10 pieces of ammunition. Only one kind of weapon blanch can be on a weapon at one time, though a weapon made of one special material (such as adamantine) can have a different material blanch (such as silver), and counts as both materials for the first successful hit.

Apply Silversheen to an Adamantine weapon.

No, but a +2 weapon *counts* as silver. So, a +2 Adamantine weapon counts as both. I assume you know this, but stating it just in case.

Thanks a lot for the answers!

As a general rule, some things shouldn't be made or allowed. Sure, it's a world of magic and wonder, but when the Core Rules disallow, or don't make provisions for something (or imply that you shouldn't, as in the case of silversheen and adamantine weapons)—there's generally a good reason why.

This would be a supreme weapon of convenience, and would circumvent DR challenges for certain monsters. Handy for the players, but at the expense of nerfing your monsters. Part of the challenge those monsters present to the players is the fact that they need weapons of different materials. It's meant to be inconvenient.

************
In fact, and this is a bit of a tangent—the magic item creation rules allow for some hybridized items. Like adding additional properties to certain items. From practical experience, I would not recommend that at all. As my personal houserule, if you're going to craft you only craft items in the Core Rulebooks.

No, but a +2 weapon *counts* as silver. So, a +2 Adamantine weapon counts as both. I assume you know this, but stating it just in case.

+3 weapons count as silver, but only for the purpose of bypassing DR.

I think the OP is wanting the weapon to actually all the properties of the material.

Rudy2 wrote:

No, but a +2 weapon *counts* as silver. So, a +2 Adamantine weapon counts as both. I assume you know this, but stating it just in case.

+3 weapons count as silver, but only for the purpose of bypassing DR.

I think the OP is wanting the weapon to actually all the properties of the material.

Oops! I thought it was +2 silver, +3 cold iron, +4 adamantine. Thanks for the correction!

Related question: is there any purpose for which it matters, besides bypassing DR?

is there any purpose for which it matters, besides bypassing DR?

Some regeneration can be overcome by silver. A few monsters "shy away" from silver, but there's not really any rules about it.

wraithstrike wrote:

Rudy2 wrote:

No, but a +2 weapon *counts* as silver. So, a +2 Adamantine weapon counts as both. I assume you know this, but stating it just in case.

+3 weapons count as silver, but only for the purpose of bypassing DR.

I think the OP is wanting the weapon to actually all the properties of the material.

Oops! I thought it was +2 silver, +3 cold iron, +4 adamantine. Thanks for the correction!

Related question: is there any purpose for which it matters, besides bypassing DR?

The hardness of the weapon is affect by the material.

Mithral actually reduces the weight of the weapon.

A weapon that is made of silver does less damage than one made of normal metal.

A weapon that is made of silver does less damage than one made of normal metal.

Unless it's a bludgeoning weapon.

wraithstrike wrote:

A weapon that is made of silver does less damage than one made of normal metal.

Unless it's a bludgeoning weapon.

I never noticed that it only calls out piercing and slashing before.

I think people are confusing normal silver, with Alchemical Silver.

Mithral and Silversheen count as Silver as well.

I think people are confusing normal silver, with Alchemical Silver.

Mithral and Silversheen count as Silver as well.

Mithral only counts as silver for the purpose of DR. When a weapon is made of silver it means alchemical silver.

The Silversheen material is decent, at only +750 per weapon.

No damage penalty either.

Rudy2 wrote:

No, but a +2 weapon *counts* as silver. So, a +2 Adamantine weapon counts as both. I assume you know this, but stating it just in case.

+3 weapons count as silver, but only for the purpose of bypassing DR.

I think the OP is wanting the weapon to actually all the properties of the material.

Depending on build, some characters can access +3 admantine or +4 weapons as early as 5th level.

What about a double weapon? One side Adamantine, the other side Silver.

What about a double weapon? One side Adamantine, the other side Silver.

Each side works as its own weapon, and you do have to pay the masterwork cost for both sides so I don't see why not.

RAW it might not work though.

Raw it works can't get my phones copy paste to work but its the first paragraph under special materials in the crb equipment section

However, you can build a double weapon with each head made of a different special material.

So long story short no. You can't have 2 material properties on the same end of a weapon.

As an aasimar (yes, I know, they're perfect), you can take both Eldritch Claws and Angelic Flesh (steel) to make any natural attacks you have both silver and cold iron. Then just be a high-level monk to make your unarmed strikes adamantine as well.

You'd have to figure out a way to get claws on yourself, and then get Feral Combat Training so you could flurry with your whatever. I'd stick with talons of leng on your hands, even though you take a hit on Wisdom. Metallic trifecta (plus insanity!)

Claws can be obtained a variety of ways. You can get a Magic Item that transforms your hands into claws.