An irrational fear or extreme dislike of crystals or crystal-like structures.
From 'crystal' combined with Greek 'phobos' meaning 'fear.' This is a relatively modern term, constructed following the standard phobia-naming convention.
Some people experience genuine distress from highly repetitive geometric patterns—a phenomenon called pattern anxiety or trypophobia's cousin—and crystallophobia might describe someone triggered specifically by the symmetry of crystals!
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