Leonardo DiCaprio has a diamond proposal for you. The Oscar winner is among an elite circle of Hollywood and Silicon Valley backers behind Diamond Foundry (Disruptor No. 33), a Bay Area company that claims it uses technology to accomplish what alchemists and others have attempted in vain for centuries: growing diamonds and other precious stones from scratch.
DiCaprio's tweet last November announcing his "proud" investment in a company "reducing human and environmental toll by sustainably culturing diamonds" alerted the planet to the little-known start-up co-founded in 2012 by former solar energy entrepreneur Martin Roscheisen. DiCaprio joined a venture party that includes Silicon Valley titans such as Google founders Larry Page and Sergey Brin, who were in the same Ph.D. program with Roscheisen at Stanford.