Uncut Gem - 1990 TV was released on:
USA: 19 April 1990
Gem and Germs - 1915 was released on: USA: 3 January 1915
Martin Yan's Hidden China - 2010 The Hidden Gem 1-9 was released on: USA: 2010
Highway Patrol - 1955 Portrait of Death - 4.7 was released on: USA: November 1958
Diamond
The web address of the Houston Gem And Mineral Society is: http://www.hgms.org
The cast of Uncut Gem - 1990 includes: Philip Akin Sam Behrens as Lewis Lolita Davidovich as Ruby Miguel Fernandes as Richard Andrew Gillies as Gus Elena Kudaba Tracy New as Sabrina Markus Parilo Ken Quinn Chuck Shamata as Max Barbara Wheeldon
To get uncut diamonds you can get them as a monster drop, from one of the gem stores, buy from other players, or purchase through the grand exchange.
Precious Gem - 2012 was released on: USA: 24 July 2012
A Gem of a Jam - 1943 was released on: USA: 30 December 1943
A Germ Gem - 1916 was released on: USA: 30 July 1916
Gem Dandy - 1970 was released on: USA: 25 October 1970
Gem and Germs - 1915 was released on: USA: 3 January 1915
You don't. You can either mine it, buy it, or get it as a random event prsent.
Poetic Gem Boyhood - 1935 was released on: USA: 27 April 1935
Gem Rush - 2011 VG was released on: USA: 2011 (Web version)
You can follow the link, below, to see images of uncut diamonds -- most of gem-stone quality -- representing only 25% of all diamonds mined.
Quests, shilo village gem rocks, monster drop and the grand exchange.