Armor made of bone

[blackbloodtroll]

Can Lamellar armor be made of stone? Using the primitive material rules from Ultimate Combat it seems alright, but I am not sure.

[Talonhawke]

Bone or Stone? Title says one post says the other?

[blackbloodtroll]

Stone, I screwed the pooch on that one.

[Talonhawke]

Lamellar Armor

Lamellar is a type of armor in which small plates of various types of materials are strung together in parallel rows using fine cord. Lamellar plates can be constructed from lacquered leather, horn, or even stone, though steel and heavier iron are most common. Lamellar armor can be crafted into various shapes, including partial pieces such as breastplates, greaves, or even entire coats. The properties of specific suits and pieces of lamellar armor are determined by their material.

Looks like a big yes to me

[blackbloodtroll]

There is no listing for stone lamellar, what version should be used as a base?

[Talonhawke]

Have to back track armor cannot be made of stone.

Stone:

Source: Pathfinder Roleplaying Game Ultimate Combat

Stone Age weapons almost always utilize stone in some way. From rocks lashed to wooden hafts to create early maces and axes, to flint knives and stone arrowheads, these primitive weapons are still deadly.

Weapons Light and one-handed bludgeoning weapons, spears, and arrowheads can all be made of stone. Weapons made of stone have half the hardness of their base weapons, and have the fragile condition. Editor's Note: Probably meant to say fragile "quality" not "condition."

Armor Armor cannot usually be constructed from stone, but advanced, often alchemically enhanced stone armor made by dwarves or other stone-working cultures does exist (see stone coat).

Cost 1/4 normal.
Weight 3/4 normal.

Cost/Weight (Longer Wording) "Stone weapons cost a quarter of what base items of their type do, and weigh 75% of what base items of their type do."

Though i would let you use the steel and call it stone for a home game.

[blackbloodtroll]

It would be unusual, but not impossible. The question would be about the base, to determine the weight and cost.

[Tinalles]

Weapons are made from brittle stone which fractures in predictable ways (obsidian, flint, chert, silicified shale, some variants of basalt). Those properties are necessary in order to produce sharp edges by flaking it.

Presumably someone making armor would choose a tougher stone which does NOT fracture. Let's say granite. That's pretty tough stuff.

Wikipedia gives the following for the relative density of granite and steel:

Granite 2.7 grams per cubic centimeter
Mild Steel 7.85 grams per cubic centimeter

Wikipedia's not the most authoritative source, but it'll do for a discussion of imaginary armor. Going by these figures, granite weighs approximately a third of what steel weighs.

Some of the weight of the armor will come from the base material that the lamellae are attached to.

As for cost, well, one the one hand stone doesn't require smelting or refining. On the other hand, the lack of routine demand for thin plates of stone for armor means they'll be more expensive to obtain. Call it a wash on that.

Probably the easiest way to do it is just use the stats for Lamellar Horn armor from Ultimate Combat, and just announce that the lamellae are actually made of some kind of tough stone instead of horn.