Gems & Gemology Summer 1957, Vol. 9, No. 2

New or Unusual Gem Materials Encountered in the Institute’s Gem Trade Laboratories

One of the favorites for Gems & Gemology readers is the Lab Notes column, the brief reports in each issue describing notable or unusual gem materials that have made their way to GIA’s laboratory. In this inaugural column from Summer 1957, Robert Crowningshield launches an enduring tradition, sharing discoveries about materials as diverse as rocks masquerading as minerals, a so-called television stone, an imitation moonstone, and dyed green jadeite.