At Jewelry Making Skill of 261 Platinum Opal Engagement Ring (Magical) Trivial at 263, 95% success rate Platinum Fire Wedding Ring (Magical) Trivial at 268, 70% success rate Platinum Star Ruby Veil (Magical) Trivial at 271, 95% success rate Is there something special about the platinum fire wedding ring (magical) or is this an error of some sort?
You are seeing luck: https://forums.daybreakgames.com/eq...ot-adjusted-for-trophies.278199/#post-4076380
This issue seemed to disappear after I leveled up my JC one skill level. Maybe the glitch is really minor.
There were several fixes for how and when the success chance is calculated in the November game update. One of those likely resolved the issue you were seeing.