Minerals from Halpern Mineral Collection, San Francisco, Photo by Eric Hunt taken on October 21 2006. License under: CC BY-NC-ND 2.0
Eric Hunt កាលពីថ្ងៃទី២១ ខែតុលា ឆ្នាំ២០០៦។ក្រោមអាជ្ញាប័ណ្ណ៖ CC BY-NC-ND 2.0