How do you get Navaratna with the console?

effect create_artifact_navaratna_effect = { OWNER = root } — runs the scripted effect that makes it, for the character you play (debug mode).

Personal artifact · Trinket

Navaratna

MasterworkUnique

Navaratna is a masterwork trinket artifact in Crusader Kings III: Court grandeur baseline +3, Renown +0.05/month, Prestige +0.5/month, Character capital county monthly development growth +0.02/month, Temple Buildings Construction Cost -10%, Temple Holding Construction Cost -10%. Quality 30 and wealth 30; maximum durability 75. Patch 1.20.0.3, from game/common/scripted_effects/01_exp1_historical_artifacts_creation_effect.txt.

Quick answers (2)

What does Navaratna do in CK3?: Court grandeur baseline +3, Renown +0.05/month, Prestige +0.5/month, Character capital county monthly development growth +0.02/month, Temple Buildings Construction Cost -10%, Temple Holding Construction Cost -10% (patch 1.20.0.3).
How do you get Navaratna with the console?: effect create_artifact_navaratna_effect = { OWNER = root } — runs the scripted effect that makes it, for the character you play (debug mode).

A chain of nine gems, with a great ruby in the middle, symbolizing the nine celestial gods in Hinduism.

Effects

Court grandeur baseline+3
Renown+0.05/month
Prestige+0.5/month
Character capital county monthly development growth+0.02/month
Temple Buildings Construction Cost-10%
Temple Holding Construction Cost-10%

History and who has it

Made before recorded history.

How it is made

The game creates it with the scripted effect create_artifact_navaratna_effect. In the console (how to open it), this gives it to the character you play:

effect create_artifact_navaratna_effect = { OWNER = root }

Built from the effect's file; not run in the game by us.

Source: game/common/scripted_effects/01_exp1_historical_artifacts_creation_effect.txt, common/modifiers (navaratna_modifier), common/artifacts/templates (general_unique_template) and the English localisation, Crusader Kings III 1.20.0.3.