Fyrite

Fyrite is a very rare metal that sometimes forms when fresh lava or magma cools against obsidian or bedrock. It often contains many trace amounts of diamond which must be removed when forging. The way it is often processed is through an extremely hot crucible forge where the diamonds are able to move freely from the soft Fyrite. A special type of hammer and anvil must be used when forging the metal or the crystalline structure can become too brittle and a poorly crafted weapon from pyrite explodes like a prince rupert's drop. This explosion is extremely dangerous sending shrapnel pieces flying. The most dedicated smiths of Fyrite are hill and/or mountain(Fire) giants. They often wear flak aprons with headgear when forging it for safety reasons.

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As a weapon or armor material:
Price Modifier: x2.5
Weight and Hardness: Same as steel.
Inherent Bonuses: Weapons and armor emit 10 feet of strong light and 15 feet of weak light. Perception checks against your stealth gain advantage when based on sight. Weapons and armor are immune to non-elemental heat.
Weapons: Bypasses the supernatural resistance/immunity of monsters with the fire/ice type. Weapons deal 1d4 fire damage on hit and ammunition deals 1d3 fire damage.
Armor: Resistance to fire. Creatures that strike you with natural attacks or weapons(while standing within your melee range) take damage equal to your proficiency as fire damage. While being grappled or grappling an opponent that creature takes the same amount of damage if they start their turn grappled with/by you.
Ammunition: 50gp per 20 or price x2, whichever is higher.

Properties

Material Characteristics

Will absorb heat up to a certain point but only emanates a portion of that heat upon the wielder. Slightly stronger than steel but slightly more brittle.

Physical & Chemical Properties

All items crafted from it are considered magical unless the item is in an area that is of freezing temperature or in the presence of a large body of water. Weapons crafted of it bypass the supernatural resistance/immunity of monsters with the fire/ice type. These weapons deal 1d4 fire damage (1d3 for ammunition). Once per day (resets at dawn) if the weapon has spent at least 1 minute within 1 foot of a source of heat above 400f the weapon stores a charge. This charge can be expelled on a successful attack dealing twice the weapons bonus fire damage.
Armor crafted of it absorbs heat from natural sources and magic.
Armor adds resistance to fire - Also, if the the equipped item is a body armor, creatures that strike you, or begin their turn while grappling/being grappled by you take fire damage equal to your proficiency bonus.

Geology & Geography

Twin Fang Peaks, Blackstone Quarry, Aeskurr Mountain

Odor

Like sulfur

Color

Like a slightly cooled piece of magma in raw form, opaque deep brick colored ingot

Melting / Freezing Point

Does not melt, malleable around 4186 F (2307c)

Common State

Solid