Australian Opal #2
Millard H. Sharp
Australian Opal #1
Millard H Sharp
Australian Opal #7
Millard H. Sharp
Cross-section Of Mexican Agate
Ted Kinsman
Synthetic Opal
Ted Kinsman
Cross-section Of Mexican Agate #2
Ted Kinsman
Cross-section Of Mexican Agate #1
Ted Kinsman
Agate Mine #1
Ted Kinsman
Australian Opal
Millard H Sharp
Australian Opal #8
Millard H Sharp
Australian Opal #3
Millard H. Sharp
Brecciated Jasper
Joel E. Arem
Ametrine, Uruguay
Joel E. Arem
Quartz And Agate Geode, Mexico
Joel E. Arem
Amethyst, Color Suite
Joel E. Arem
Amethyst From Vera Cruz, Mexico
Joel E. Arem
Picture Jasper
Joel E. Arem
Australian Opal #4
Millard H. Sharp
Australian Opal #6
Millard H. Sharp
Agate, Mexico
Joel E. Arem
Smoky Quartz
Joel E. Arem
Silicon Nanowire, Tem
Bonevich/NIST