Dense Fossil Farming, Crafting Mods, Biomes

Dense Fossil is a fossil type. Fossils are a special type of poe currency introduced in the delve league that can be socketed into resonators to modify the crafting behavior in specific ways. Fossils can also add special Delve modifiers.

Farming Dense Fossil in Azurite Mine

The drop location of Dense Fossil is Azurite Mine. Standing on any Waypoint, click the flashing candle icon: "Click to travel to the Mine Encampment", then you will go to the Azurite Mine.

Azurite Mine

There are two ways to obtain Dense Fossil.

1. Purchase from Niko the Mad

Sometimes, Niko the Mad sells a Dense Fossil for 1 000 Azurite. Niko is one of the five masters. He provides introduction to delves and appears when harvesting Voltaxic Sulphite. He also sells Fossils and Resonators for Azurite.

2. It can be dropped from the following Biome:

Fungal Cavern
Petrified Forest

In addition, you can also exchange currency items for it. The price of Dense Fossil is an Orb of Alchemy. You can buy cheap POE currency from below:

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How to use Dense Fossil?

Place a Dense Fossil in a Resonator to influence item crafting. Effect:

More Armour, Energy Shield or Evasion modifiers
No Life Modifiers

Dense Fossil Crafting Mods

Spawn Weight Multipliers: Using this fossil multiplies the spawn weights of all modifiers with life tags by 0 and defences tags by 10.

Added Mods: The following mods are added to the crafting pool when using this fossil.

Name	Generation Type	Group	Level	Stats	Spawn Weighting
of the Underground	Suffix	PhysicalDamageReductionRatingIfYouHaveHitAnEnemyRecently	1	+500 to Armour if you've Hit an Enemy Recently	abyss_jewel 0 jewel 0 two_hand_weapon 0 sceptre 1600 mace 1600 axe 1600 sword 1600 default 0
of the Underground	Suffix	PhysicalDamageReductionRatingIfYouHaveHitAnEnemyRecently	1	+1000 to Armourif you've Hit an Enemy Recently	abyss_jewel 0 jewel 0 one_hand_weapon 0 staff 1600 mace 1600 axe 1600 sword 1600 default 0
of the Underground	Suffix	EvasionRatingIfYouHaveHitAnEnemyRecently	1	+500 to Evasion Rating if Hit an Enemy Recently	abyss_jewel 0 jewel 0 two_hand_weapon 0 axe 1600 sword 1600 dagger 1600 claw 1600 default 0
of the Underground	Suffix	EvasionRatingIfYouHaveHitAnEnemyRecently	1	+1000 to Evasion Rating if Hit an Enemy Recently	abyss_jewel 0 jewel 0 one_hand_weapon 0 axe 1600 sword 1600 bow 1600 default 0
of the Underground	Suffix	EnergyShieldRegenerationRatePerMinuteIfYouHaveHitAnEnemyRecently	1	Regenerate 0.5% of Energy Shieldper second if you've Hit an Enemy Recently	abyss_jewel 0 jewel 0 dagger 1600 claw 1600 wand 1600 sceptre 1600 default 0
of the Underground	Suffix	EnergyShieldRegenerationRatePerMinuteIfYouHaveHitAnEnemyRecently	1	Regenerate 1% of Energy Shield per second if you've Hit an Enemy Recently	abyss_jewel 0 jewel 0 staff 2000 default 0
of the Underground	Suffix	MaximumEnergyShieldFromBodyArmour	1	(20-30)% increased Energy Shield from Body Armour	abyss_jewel 0 jewel 0 ring 1600 amulet 1600 belt 1600 default 0
of the Underground	Suffix	ChanceWhenHitForArmourToBeDoubled	1	20% chance when Hit for double Armour effect	abyss_jewel 0 jewel 0 ring 1600 amulet 1600 belt 1600 default 0
of the Underground	Suffix	AdditionalChanceToEvade	1	+(1-2)% chance to Evade Attack Hits	abyss_jewel 0 jewel 0 quiver 1600 ring 1600 amulet 1600 belt 1600 default 0
Subterranean	Prefix	AllDefences	1	(4-6)% increased Global Defences	jewel 1000 abyss_jewel 1000 default 0
of the Underground	Suffix	PhysicalDamageReductionRatingIfYouHaveHitAnEnemyRecently	1	+(250-300) to Armour if you've Hit an Enemy Recently	jewel 300 abyss_jewel 300 default 0
of the Underground	Suffix	EvasionRatingIfYouHaveHitAnEnemyRecently	1	+(250-300) to Evasion Rating if Hit an Enemy Recently	jewel 300 abyss_jewel 300 default 0
of the Underground	Suffix	EnergyShieldRegenerationRatePerMinuteIfYouHaveHitAnEnemyRecently	1	Regenerate 0.3% of Energy Shieldper second if you've Hit an Enemy Recently	jewel 300 abyss_jewel 300 default 0
of the Underground	Suffix	IncreasedQuality	1	+(10-20)% to Quality	local_item_quality 0 abyss_jewel 0 jewel 0 shield 2000 body_armour 2000 default 0
of the Underground	Suffix	EnergyShieldRegeneration	1	Regenerate 1% of Energy Shield per second	abyss_jewel 0 jewel 0 shield 0 body_armour 0 gloves 0 helmet 0 int_armour 2000 dex_int_armour 2000 str_int_armour 2000 default 0
of the Underground	Suffix	EnergyShieldLeechPermyriad	1	0.3% of Spell Damage Leeched as Energy Shield	abyss_jewel 0 jewel 0 shield 0 body_armour 0 boots 0 helmet 0 int_armour 2000 dex_int_armour 2000 str_int_armour 2000 default 0
of the Underground	Suffix	SpellBlockPercentage	1	(3-4)% Chance to Block Spell Damage	abyss_jewel 0 jewel 0 shield 0 body_armour 0 boots 0 gloves 0 int_armour 2000 dex_int_armour 2000 str_int_armour 2000 default 0
of the Underground	Suffix	ChanceToDodge	1	(3-4)% chance to Dodge AttackHits (3-4)% chance to Dodge Spell Hits	spell_dodge_mod 0 abyss_jewel 0 jewel 0 shield 0 body_armour 0 gloves 0 helmet 0 dex_armour 2000 dex_int_armour 2000 str_dex_armour 2000 default 0
of the Underground	Suffix	BlindOnHit	1	(4-6)% Global chance to Blind Enemies on hit	abyss_jewel 0 jewel 0 shield 0 body_armour 0 boots 0 helmet 0 dex_armour 2000 dex_int_armour 2000 str_dex_armour 2000 default 0
of the Underground	Suffix	EvasionOnFullLife	1	(25-50)% increased Global Evasion Ratingwhen on Full Life	abyss_jewel 0 jewel 0 shield 0 body_armour 0 gloves 0 boots 0 dex_armour 2000 dex_int_armour 2000 str_dex_armour 2000 default 0
of the Underground	Suffix	ChanceWhenHitForArmourToBeDoubled	1	(10-20)% chance when Hit for double Armoureffect	abyss_jewel 0 jewel 0 shield 0 body_armour 0 gloves 0 helmet 0 str_armour 2000 str_int_armour 2000 str_dex_armour 2000 default 0
of the Underground	Suffix	BlockPercent	1	(3-4)% Chance to Block Attack Damage	abyss_jewel 0 jewel 0 shield 0 body_armour 0 boots 0 helmet 0 str_armour 2000 str_int_armour 2000 str_dex_armour 2000 default 0
of the Underground	Suffix	FortifyEffect	1	(15-25)% increased Effect of Fortify on you	abyss_jewel 0 jewel 0 shield 0 body_armour 0 gloves 0 boots 0 str_armour 2000 str_int_armour 2000 str_dex_armour 2000 default 0

Biomes

The Azurite Mine contains six common biomes, each with different monsters, encounters, and common fossil drops. Rarely, a city biome will spawn, which contains better loot and rarely, a special boss, but are much more difficult and denser.

Current theory on weights:

The weight is scaled between the lower and upper entries based on current delve depth. See the table below for data mined values.

Biome	Fossils by Rarity	Minimum Depth
Biome	Fossils by Rarity	Depth	Weight
Mines	Metallic Fossil, Serrated Fossil, Pristine Fossil, Aetheric Fossil	0	100
		40	100
		65	0
Fungal Caverns	Dense Fossil, Aberrant Fossil, Perfect Fossil, Corroded Fossil, Gilded Fossil	4	0
Fungal Caverns		20	100
Petrified Forest	Bound Fossil, Jagged Fossil, Corroded Fossil, Sanctified Fossil	4	0
Petrified Forest		20	100
Abyssal Depths	Aberrant Fossil, Bound Fossil, Gilded Fossil, Lucent Fossil	10	0
Abyssal Depths		25	100
Frozen Hollow	Frigid Fossil, Serrated Fossil, Prismatic Fossil, Sanctified Fossil	200	0
Frozen Hollow		40	100
Magma Fissure	Scorched Fossil, Prismatic Fossil, Pristine Fossil, Enchanted Fossil, Encrusted Fossil	30	0
Magma Fissure		50	100
Sulfur Vents	Metallic Fossil, Perfect Fossil, Aetheric Fossil, Encrusted Fossil	55	0
Sulfur Vents		75	100
Vaal Outpost		22	0
		83	12
		600	18
Abyssal City		82	0
		83	4
		220	12
		600	18
Primeval Ruins		219	0
		220	4
		600	12

How to use Dense Fossil?

Place in a Resonator to influence item crafting.

Dense Fossil

List of delve socketable currency

Item	Drop Level	Effect(s)
Potent Alchemical Resonator	1	Upgrades a normal item to a rare item
Potent Chaotic Resonator	34	Reforges a rare item with new random modifiers
Powerful Alchemical Resonator	34	Upgrades a normal item to a rare item
Powerful Chaotic Resonator	34	Reforges a rare item with new random modifiers
Prime Alchemical Resonator	68	Upgrades a normal item to a rare item
Prime Chaotic Resonator	68	Reforges a rare item with new random modifiers
Primitive Alchemical Resonator	1	Upgrades a normal item to a rare item
Primitive Chaotic Resonator	34	Reforges a rare item with new random modifiers