Roses of Desert

• Roses of Desert
  Norman County, Oklahoma, U.S.A.
  
  If you take a look at the picture, you might think it is a fossil of flower, but actually it is crystallized barium sulfate generated in the desert sand.
  Barium sulfate at the underground of the desert dissolves into water, and ascends up to near the earth surface. The water escapes as vapor.
  The remaining barium sulfate crystallizes including surrounding sand particles to form sand roses.
  Barium sulfate is used as a material for white liquid you drink when taking x-ray pictures.
  The desert sand in Oklahoma, U.S.A. is red colored, so the sand roses from this place are just like red roses.