crystallised

having become fixed and definite in form; "distinguish between crystallized and uncrystallized opinion"- Psychological Abstracts

यह खनिज ऑर्थोरौबिक समुदाय में क्रिस्टलीकृत होता है।

They were there in his mind in a vague form and as days passed by his earlier thoughts and feelings crystallised into convictions.