critical hit chance

PLEASE REPORT ANY ISSUES IN YOUR GAME HERE! Please be aware that spoilers ARE allowed in this thread! A template you can follow: explain the issue (including any pattern you noticed about when it happens); full error text (if any); what OS you are using; in-game language; single-player or...

Forging aquamarine into my weapons (I tried this with Galaxy Sword and Iridium Needle) adds less critical hit chance than expected: the first level adds +2, and the second and third add +3. Comparing to the wiki, this seems to be about half of what it should be? Game Version: 1.5.4.2 Language...