Throughout your Stalker 2 along the way, you'll encounter several different types of anomalies that cause all sorts of distortions. One of these anomalies is Gravitational kind, and you can find Artifact on one of them in an interesting place in the Little Zone, simply called Zebra.
Related
STALKER 2: Heart of Chornobyl – all main missions
Discover all the main missions in STALKER 2: Heart of Chornobyl. Track your progress, see how many missions you've completed and see what's left.
Rib Anomaly in Stalker 2
How to get the Ribs artifact
You can find Placement of ribs in the Small Zonejust southeast of the Zalissya base. Once you arrive at the location, you will see the deformations of the anomalies around.
Be sure to pull out the screws and throw them around in warps to prevent damage. The screws remove the distortion for a few seconds, allowing you to use Detector and search for the artifact.
In terms of use, this shouldn't be your first rodeo
Stalker 2
's Artifact detector , but just in case you're not sure how to use it, just hold down the left shoulder button (console) or Tab (PC) to open the Radial Menu. Then the detector will be on the bottom left (left directional button).
Unfortunately, finding artifacts can be quite annoying Stalker 2. The location of the artifact will vary from player to player, but just watch your detector beepand eventually you will find it. AND call for pickup will appear once you're close enough, but be sure to get out of the anomaly instead of sticking around, as you're bound to keep taking gravity warp damage.
As for the artifact that is in Rib Anomalyit varies from player to player. In my playthrough I was able to get unusual crown artifact. It has weak physical protection and weak resistance, but causes some radiation, like other artifacts. It's best to use them if you have something else to counter the radiation effects.