Blood Gems

Blood Gems are upgrade items in Bloodborne that the player can upgrade their Weapons with at the Workshop. Can drop in Chalice Dungeons, be found in chests or dropped by certain enemies. You can also consume some special items to gain unique Blood Gems.

There are several types of Blood Gems, which are further divided into categories determined by the general shape of the Gem. Radial, Triangular, and Waning Blood gems are installed onto right-hand weapons. Circular gems are installed onto left-hand weapons (Except the Lost Chikage, which has a circular socket). Droplet can be fit into any socket regardless of its shape. Blood Gems can be installed to Weapons after their Imprint sockets are unlocked via upgrading. A new socket is unlocked at upgrade levels +1, +3 and +6. (Firearms only have 1 or no socket). However, installation of a Blood Gem is not permanent: One can remove blood gems and reinstall new ones at the workshop table at any time without consequence or cost.

Blood Gems' strengths vary greatly. This is represented by its rating of 1-20, although higher rarity blood gems are not guaranteed to be stronger than lower level gems.

Some Initial Blood Gem Tips

• You can read This very detailed guide to understand Blood Gems, drops and farming. Further articles include builds and farming tips, check them out here.
• The only known way to gain Bloodtinge Gemstones as drops are from Bloodsucking Beasts  and Labyrinth Ritekeepers from chalice dungeons.
• Gems that grant bonus elemental damage will change your weapon's damage form from physical to bolt/fire/arcane and become scaled by your Arcane stat (strength and skill scaling will be disabled) when installed, unless the weapon deal multiple damage forms by default, in which case the weapon will retain physical/skill scaling but changes damage form to bolt/fire/arcane.
• Some blood gems have the "cursed" prefix and reduce the weapon's durability. However, multiple installations of such gems do not stack up in effect. E.g. installing 1 cursed blood gem which decreases weapon durability by say 50 and installing 2 of the same gems will make the weapon equally easy to break.

A complete list of Blood Gem effects:

Blood Gems List

Radial

Triangular

Waning

Circle

Key Items

Materials (Upgrades & Ritual)

Droplet

Radial Blood Gems

Name & Icon		Best Possible Gem Versions Location
Tempering Blood Gemstone Effect: Physical ATK UP +%	1-10	Lower Pthumeru Root Chalice Bosses Chalice Dungeon
Cursed Tempering Blood Gemstone Effect: Physical ATK UP +% Effect: Random negative effect	1-10	Fetid Lower Pthumeru Root Chalice awd85dhdd: Layer one. Dropped by fire wielding mummy that's guarding the lever
Tempering Damp Blood Gem Effect: Physical ATK UP +%	11-19	Pthumeru Ihyll Root Chalice Bosses in this Chalice Dungeon
Cursed Tempering Damp Blood Gem Effect: Physical ATK UP +27.2% Effect: Random negative effect	11-19	Pthumeru Ihyll Root Chalice (with Cursed rite) Bosses in this Chalice Dungeon (Watchers) Glyph: pwmf22gu
Adept Blood Gemstone Effect: Blunt or Thrust ATK UP +%	1-10	Lower Pthumeru Root Chalice Bosses Chalice Dungeon
Cursed Adept Blood Gemstone Effect: Blunt or Thrust ATK UP +% Effect: Random negative effect	1-10	??
Adept Damp Blood Gem Effect: Blunt or Thrust ATK UP +%	11-19	Pthumeru Ihyll Root Chalice Bosses in this Chalice Dungeon
Cursed Adept Damp Blood Gem Effect: Blunt or Thrust ATK UP +% Effect: Random negative effect	11-19	Pthumeru Ihyll Root Chalice (with Cursed rite) Bosses in this Chalice Dungeon (Undead Giant) Glyph: pwmf22gu
Fire Blood Gemstone Effect: Fire ATK UP +%	1-10	Lower Pthumeru Root Chalice Bosses Chalice Dungeon
Cursed Fire Blood Gemstone Effect: Fire ATK UP +% Effect: Random negative effect	1-10	??
Cursed Fire Damp Blood Gem Effect: Fire ATK UP +23.9% Effect: Random negative effect, add fire	11-19	Pthumeru Ihyll Root Chalice (with Cursed rite) Bosses in this Chalice Dungeon (Watchdog)
Nourishing Damp Blood Gem Effect: ATK UP +flat	11-19	Pthumeru Ihyll Root Chalice Bosses in this Chalice Dungeon (Amygdala and Rom, the Vacuous Spider)
Cursed Nourishing Damp Blood Gem Effect: ATK UP +% Effect: Random negative effect	11-19	Pthumeru Ihyll Root Chalice (with Cursed rite) Bosses in this Chalice Dungeon (Amygdala and Rom, the Vacuous Spider)
Odd Tempering Blood Gemstone Effect: Adds physical ATK +flat	1-10	Lower Pthumeru Root Chalice Bosses Chalice Dungeon
Odd Tempering Damp Blood Gem Effect: Add physical ATK +flat	11-19	Pthumeru Ihyll Root Chalice Bosses in this Chalice Dungeon
Cursed Odd Tempering Damp Blood Gem Effect: Adds physical ATK +flat Effect: Random negative effect	11-19	Pthumeru Ihyll Root Chalice (with Cursed rite) Bosses in this Chalice Dungeon
Heavy Blood Gemstone Effect: Improves STR scaling +flat	1-10	Lower Pthumeru Root Chalice Bosses Chalice Dungeon
Cursed Heavy Abyssal Blood Gem Effect: Improves STR scaling +65 Effect: Random negative effect	20	Pthumeru Ihyll Root Chalice (with Cursed rite) Bosses in this Chalice Dungeon (Headless Bloodletting Beast)
Sharp Blood Gemstone Effect: Improved Skill Scaling +flat	1-10	Lower Pthumeru Root Chalice Bosses Chalice Dungeon
Cursed Sharp Damp Blood Gem Effect: Skill Scaling UP +flat Effect: Random negative effect	11-19	Pthumeru Ihyll Root Chalice (with Cursed rite) Bosses in this Chalice Dungeon (Keeper of the Old Lords)
Cold Blood Gemstone Effect: Arcane Scaling UP +flat	1-10	Lower Pthumeru Root Chalice Bosses Chalice Dungeon
Murky Blood Gemstone Effect: Adds slow poison effect +flat	1-10	Lower Pthumeru Root Chalice Bosses Chalice Dungeon
Dirty Blood Gemstone Effect:Adds rapid poison effect +flat	1-10	Lower Pthumeru Root Chalice Bosses Chalice Dungeon
Dirty Damp Blood Gem Effect: Adds rapid poison effect +flat	11-19	Pthumeru Ihyll Root Chalice Bosses in this Chalice Dungeon
Beasthunter's Damp Blood Gem Effect: ATK vs Beast UP +%	11-19	Pthumeru Ihyll Root Chalice Bosses in this Chalice Dungeon
Kinhunter's Damp Blood Gem Effect: ATK vs the kin UP +%	11-19	Pthumeru Ihyll Root Chalice Bosses in this Chalice Dungeon
Striking Blood Gemstone Effect: Charge ATKs UP %	1-10	Lower Pthumeru Root Chalice Bosses Chalice Dungeon
Striking Damp Blood Gem Effect: Charge ATKs UP +%	11-19	Pthumeru Ihyll Root Chalice Bosses in this Chalice Dungeon
Cursed Striking Blood Gemstone Effect: Charge ATKs UP +% Effect: Random negative effect	11-19	Pthumeru Ihyll Root Chalice (Watchers)
Radiant Blood Gemstone Effect: Reduces stamina cost -%	1-10	Lower Pthumeru Root Chalice Bosses Chalice Dungeon
Cursed Radiant Damp Blood Gem Effect: Reduces Stamina costs 8 % Effect: Random negative effect	11-19	Pthumeru Ihyll Root Chalice Bosses in this Chalice Dungeon (Maneater Boar)
Fool's Blood Gemstone Effect: Phys. UP at full HP +%	1-10	Lower Pthumeru Root Chalice Bosses Chalice Dungeo
Gold Blood Gem Effect: ATK vs beasts UP +%	11-19	??
Cursed Fire Abyssal 24.8% fire add random second effect	20	FRC Ihyll Boss: Watchdog
Cursed Bolt 20-22% bolt second effect doubled

 

Gallery

Other Blood Gem Guides (external sources) 

• The Bloodborne Sheets by Sljm8D (guide for top-tier Blood Gems, Runes and other Labyrinth goodies)
• The Arcanist Cookbook by Sljm8D (farming guide for the setting up Arcane builds)
• Fixed Blood Gem locations (main game and labyrinth) by Sljm8D
• How Do Gems Drop In Labyrinths by Sljm8D
• Chalice Dungeon Codes for Blood Gem Farming by kazin1979