Blood Gems — Bloodborne

Blood Gems — Blood gems, Bloodborne. Unlock slots, read effects and improve your weapon without consuming your gems.

Installing gems

Collect the Blood Gem Workshop Tool just before Oedon Chapel, then use the workbench in the Hunter's Dream.
Upgrade a compatible weapon to open its slots. Gems can be removed and reused on another weapon.

Shape: it must fit the slot. A droplet fits every shape.
Primary effect: check the damage type or stat the weapon actually uses.
Secondary effect: can offset a lower primary percentage, depending on the move and target.
Curse: assess its cost across the whole setup. The rating, from 1 to 20, is not enough to choose.

A slot accepts a gem of its shape, or a droplet. Installing, removing and moving a gem does not consume it.

Obtain the Blood Gem Workshop Tool before Oedon Chapel, then use the workbench in the Hunter's Dream.

Left-hand offensive effects do not transfer to the right-hand weapon. Passive regeneration is an exception.

Effect	Value
Physical ATK	+7,3 %
Physical at full HP	+2,7 %

https://www.bloodborne-wiki.com/2015/10/individual-blood-gems.html

Cathedral Ward · Fixed treasure · After the cathedral square, on the route to the Forbidden Woods.

Found in the world: no chalice glyph is required.

Effect	Value
Fire ATK	+8,4 %
Regeneration	1 HP / 3 s

https://www.bloodborne-wiki.com/2015/10/individual-blood-gems.html

Healing Church Workshop · Fixed treasure · On the corpse in the street below the workshop.

Found in the world: no chalice glyph is required.

Effect	Value
Blood ATK	+12,6 %

https://www.bloodborne-wiki.com/2015/10/individual-blood-gems.html

Healing Church Workshop · Fixed treasure · Chest in the first part of the tower.

Found in the world: no chalice glyph is required.

Normal, Uncanny and Lost versions differ in their gem slots. Their stats are identical.