Blood damage gems — Bloodborne
Blood damage gems — Blood gems, Bloodborne. Strengthen a native blood component, particularly that of a firearm.

Use and limit
The blood percentage only increases blood damage already present. It does not convert a purely physical weapon into a blood weapon. Circle gems fit compatible firearms.
Physical gems also increase blood damage; specialised gems allow a higher percentage, but another shape may be difficult to obtain.
Two profiles to compare
| Published variant | Compare according to stats |
|---|---|
| +31.5% blood | High percentage |
| +28.7% blood +7.3 flat blood | Flat secondary effect, whose value depends on starting attack |
Where to find this variant
| Published effect | Shape and dungeon | Target and glyph |
|---|---|---|
| +31.5% blood | Circle · Isz, layer 1 | Shotgun Watcher: chest in the pre-lamp side area · y592byza |
| +28.7% blood +7.3 flat | Circle · Lower Loran, layer 1 | Blood-starved Beast · jvz8469j |
These routes use Fetid, Rotted and Cursed rites unless stated otherwise. Values describe possible variants, rather than guaranteed drops. The glyphs are published in the wiki; their online availability has not been verified.
Gem effects and acquisition
Increases a native blood component. A circle gem fits compatible firearms.
The hit must deal blood damage. This effect does not convert a purely physical weapon into a blood weapon.
Compatible percentages multiply across gems. Flat additions remain separate from the product of percentage bonuses.
| Effect | Value |
|---|---|
| Shotgun Watcher | +31,5 % |
| Blood-starved Beast boss | +28.7% and +7.3 flat |
| Mensis treasure | +21,6 % |
+31.5% blood
| Effect | Value |
|---|---|
| Blood ATK | +31,5 % |
One random curse
https://www.bloodborne-wiki.com/2015/10/individual-blood-gems.html
y592byza · Isz · 1 · Shotgun Watcher: chest in the pre-lamp side area
- Fetid
- Rotted
- Cursed
+28.7% blood +7.3 flat
| Effect | Value |
|---|---|
| Blood ATK | +28,7 % |
| Flat blood | +7.3 points |
One random curse
https://www.bloodborne-wiki.com/2015/10/individual-blood-gems.html
jvz8469j · Lower Loran · 1 · Blood-starved Beast
- Fetid
- Rotted
- Cursed
Mensis blood droplet
| Effect | Value |
|---|---|
| Blood ATK | +21,6 % |
https://www.bloodborne-wiki.com/2015/10/individual-blood-gems.html
Nightmare of Mensis · Fixed treasure · End of the middle bridge near the Brain of Mensis.
Found in the world: no chalice glyph is required.
- Physical gems also strengthen blood; compare their bonus and the available shape.
- The route's +31.5% is the documented variant, rather than a promise for every kill.
Source : Bloodborne Wiki · CC BY-SA 3.0