This yellow-green beryl (perhaps properly called heliodor more than aquamarine) is from the classic Strickland Quarry, and crystals of this size and gemminess have not been found there in decades. The crystal is fully terminated, with a step atop, which is rare - most are broken, repaired, and ugly! This is actually a beautiful crystal that would be at home in any collection of US gem classics. From the noted Connecticut collection of Bruce Jarnot, to me in trade perhaps 4-5 years ago.