This uncut crystal weighs 858 carats—huge for an emerald. It is named after the mining district where it was found in 1967. Rarely are crystals of such size and extraordinary color preserved. Usually they are cut into gems. Harry Winston, Inc., donated the Gachala Emerald to the Smithsonian Institution National Museum of Natural History in 1969.


  • Title: Gachala Emerald Crystal
  • Location: Vega de San Juan mine, Colombia, South America
  • Type: Gem
  • Rights: This image was obtained from the Smithsonian Institution. The image or its contents may be protected by international copyright laws. http://www.si.edu/termsofuse
  • External Link: View this object record in the Smithsonian Institution Collections Search Center
  • Weight: 858ct
  • USNM Catalog Number(s): 122078
  • Photo Credit: Chip Clark, Smithsonian Institution National Museum of Natural History
  • Field: Mineral Sciences

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