Skip to main content
Smithsonian Institution
Main Menu
Visit
Exhibits
Research
Education
Events
About
Join us
Donate
Search
Search
Close
Smithsonian National Museum of Natural History
GeoGallery
Breadcrumb
Home
GeoGallery
Mimetite
Missouri River Sapphires
Opal bone
Opal in matrix
Opal replacing wood
Orthoclase (var. adularia) with dolomite
Paradamite with pharmacosiderite
Paraiba Tourmaline
Peridot in Basalt
Prehnite
Purple agate
Pyrite with calcite
Pyromorphite
Pyrophyllite
Quartz
Quartz (var. agate)
Quartz (var. agate)
Quartz (var. agate)
Quartz (var. agate)
Quartz (var. agate)
Quartz (var. agate)
Quartz (var. amethyst geode)
Quartz (var. amethyst geode)
Quartz (var. amethyst)
Quartz (var. amethyst)
Quartz (var. amethyst)
Quartz (var. amethyst)
Quartz (var. landscape agate)
Quartz (var. smoky quartz) with microcline
Quartz (var. smoky-citrine)
Rhodochrosite
Rock Creek Sapphires
Roebling Opal
Rutile
Scorodite
Sinuous Gypsum
Pagination
First page
First
Previous page
Previous
Page
1
Page
2
Current page
3
Page
4
Next page
Next
Last page
Last
Home
Smithsonian Institution
Terms of Use
Privacy Policy
Host an Event
Jobs
Press
Blog
Contact Us