gem·ol·o·gy or gem·mol·o·gy 
(jĕ-mŏlə-jē)
(jĕ-mŏlə-jē)n.
The study of gems.
gem′o·logi·cal (jĕm′ə-lŏjĭ-kəl) adj.
gem·olo·gist n.
- overcapitalization
- overcapitalize
- overcast
- overcasting
- overcautious
- overcautiously
- overcautiousness
- overcharge
- overclass
- overcloud
- overcoat
- overcoating
- overcome
- overcommit
- overcommitment
- overcompensate
- overcompensation
- overcompensatory
- overconfidence
- overconfident
- overconfidently
- overcorrect
- overcorrection
- overcritical
- overcritically