posts tagged "crystal"

reblog   notes:1   posted:1 year ago   tags:skull  gem  night  candel  crystal  
sarahmagdalena: Duftite with Calcite. Pretty!
reblog   notes:33   posted:1 year ago   tags:Duftite  Calcite  Crystal  Mineral  Gemstone  Mindat.org  
kliapatra: First discovered about a decade ago, the largest known cave crystals—single hunks of gypsum as much as 11 meters long, 1 meter thick, and weighing 55 tons—could have taken up to 1 million years to grow, a new study suggests. The cavern in the Mexican silver and lead mine where the crystals were found was filled with mineral-rich waters until 1975, when it was drained to provide miners with access to new ore veins. Lab tests indicate that the gypsum hunks crystallized at temperatures between 54°C and 58°C, researchers report online today in the Proceedings of the National Academy of Sciences. By immersing a hunk of gypsum in a sample of the cave’s waters and using a microscopic imaging technique that allowed the scientists to directly measure crystal growth, the team found that at 55°C, near the temperature at which the crystals would have grown most slowly, it would take around 990,000 years for a gypsum crystal 1 meter in diameter to form. At water temperatures of 56°C, the same crystal could have formed in about 500,000 years. I need to get myself to Mexico
reblog   notes:98   posted:1 year ago   tags:crystal  geochemistry  geology  geophysics  amazing  rocks  science  nature  
reblog   notes:83   posted:1 year ago   tags:crystal  stone  rock  beautiful  glitter  want  blue  space  
Bariopharmacosiderite.
reblog   notes:20   posted:1 year ago   tags:Bariopharmacosiderite  crystal  gemstone  mineral  Mindat.org  
Purple Fluorites.
reblog   notes:13   posted:1 year ago   tags:Fluorite  crystal  gemstone  mineral  Mindat.org  
Red and hot Vanadinite.
reblog   notes:58   posted:1 year ago   tags:Vanadinite  Crystal  Mineral  Gemstone  Mindat.org  
reblog   notes:146   posted:1 year ago   tags:witch  wicca  pagan  mortar  pestle  crystal  shell  
 Amethyst.
reblog   notes:23   posted:1 year ago   tags:Amethyst  Quartz  Mineral  Crystal  Gemstone  Fabreminerals.com  
Green Paratacamite.
reblog   notes:14   posted:1 year ago   tags:Paratacamite  Crystal  Mineral  Gemstone  Mindat.org  

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