Harvesting

In your downtime you may harvest resources.
Some materials can only be collected via down time, these you will find information about below, but you may also harvest any of those found in the crafting submenus, these include minerals, plants and parts. Regardless of what you are harvesting the process remains the same, though relevant stats change. (eg intelligence instead of consitution for plant harvesting, nature to harvest beast parts etc)

For collecting those materials, a character needs to make a Strength (Athletics), Intelligence or a Dexterity check, depending on the material .

RollResult
0-5You collected 1d4 units of the resource.
6-10You collected 2d4 + con (or relevant modifier), units of the resource.
11-15You collected 3d4 + con (or relevant modifier), units of the resource.
16-20You collected 4d4 + con (or relevant modifier), units of the resource.
21+You collected 5d4 + con (or relevant modifier), units of the resource.

The time used for extracting minerals and other materials equals to 1 week of downtime activity. This represents all the time the character uses to find and extract the materials.

Complications

Going out and harvesting resources can be dangerous! You have a 80% chance of running into a complication.

d8Result
1You run into a combat of CR equal to (gold cost of the item) divided by 50.
2You run into a combat of CR equal to 1/4 your player level.
3You were robbed of half your resources, while collecting.
4Roll Twice.
5You uncover a new section of map!
6You get lost and fail to find any resources.
7You run into a combat of CR equal to (gold cost of the item) divided by 100.
8You run into a combat of CR equal to 1/6 your player level.

Non-Minerals

There’re also other materials which are not ores or gemstones, such as wood, stone, and coral that can be also used to craft weapons, armor, and other kind of items and gear.

AEROCRYSTAL

A light blue, glass-like crystal known for creating quick, precise weapons.

Unit value: 500 gp

Weapon: You can use your Dexterity modifier for attacks and damage made with an aerocrystal weapon.

CORAL

Mostly used by sea and waterborne creatures to create their weapons and armors.

Unit value: 100 gp

Armor: Replaces the metal. While wearing a medium or heavy armor (non hide) made with coral, you speed while swimming increases by 10 feet.

Weapons: Any melee weapon made with coral doesn’t have disadvantage on the attacks rolls while underwater.

DARKWOOD

This piece of wood is as hard as normal wood but very light.

Unit value: 100 gp

Armor: Replaces the metal of any medium or heavy armor.

ETERNAL ICE

This cold white-blue block of ice resist high temperatures, being unable to melt in normal conditions.

Unit value: 500 gp

Weapon: Used to craft cold damage dealing weapons, such as the frost brand.

Other: Used to craft cold damage dealing magic items, such as the staff of frost.

IGNUM

This black semi-translucent stone have some lava-like glowing and flowing inside of it.

Unit value: 500 gp

Weapon: Used to craft fire damage dealing weapons, such as the flame tongue.

INFERNAL LEATHER

A reddish hard leather created in the infernal planes.

Unit value: 750 gp

Armor: Used to craft an armor of fire resistance (leather or studded leather).

LEAFWEAVE

Alchemically processed leaves that are hard as leather, used also as camouflage.

Unit value: 100 gp

Other: Used to craft the boots of elvenkind and the cloak of elvenkind.

OBSIDIAN

This black to deep purple glass-like stone is known to be very sharp.

Unit value: 250 gp

Armor: While wearing a medium or heavy armor (non hide) made with obsidian, when an enemy tries to grapple you, it takes 1d4 slashing damage.

Weapons: Used for crafting the sword of sharpness.

SHADOWFELL LINEN

A dark and purple linen found in the shadowfell.

Unit value: 750 gp

Armor: Used to craft an armor of psychic resistance(leather or studded leater).

SPIRITUAL WOOD

This cyan-like wood has a natural connection with the magic.

Unit value: 250 gp

Armor: Replaces the metal of any medium or heavy armor. While wearing an spiritual wood armor, you gain a +3 bonus to concentration checks to maintain a spell.

Image – https://geektyrant.com/news/hamunds-harvesting-handbook-is-another-dampd-supplement-to-introduce-harvesting-rules