Pyrite Crystals
Matthias Lenke
Aragonite From Tazouta, Morocco
Joel E. Arem
Apophyllite From Paterson, New Jersey
Joel E. Arem
Aragonite From Tintic, Utah
Joel E. Arem
Gypsum From Cherokee Flats, Oklahoma #1
Joel E. Arem
Copper From Arizona
Joel E. Arem
Gypsum From Cherokee Flats, Oklahoma
Joel E. Arem
Wulfenite From Arizona
Joel E. Arem
Stellerite With Quartz
A.b. Joyce
Magnesite And Quartz
A.b. Joyce
Melanite Garnet
A.b. Joyce
Mimetite From Mexico
Joel E. Arem
Cluster Of Snowflakes
Perennou Nuridsany
Snow Crystal #11
National Snow and Ice Data Center
Melting Snowpack
National Snow and Ice Data Center
Pyrite And Quartz
Mark Windom
Quartz And Pyrite, Close
Mark Windom