Looks like an "Ancort" from the logo stamped on the very top most edge. try to google it.

Better yet, I did it for you :) all information on the phone is here: http://www.sybarites.org/2006/07/14/ancort-diamond-crypto-smart-phone-designed-by-peter-aloisson/

Or the official page of the Austrian designer Peter Aloisson http://www.aloisson.com/m-6430.php. Apparently he's done more jewelry embedded phones, each of which can be seen at his website. "In 1998 the controversial designer released his first diamond-encrusted cell phone and earlier last year Aloisson debuted a record-breaking $1.3 million dollar diamond crypto smart phone for Russian encrypting specialist company JSC Ancort."

Case is made of Cantaffordium, insides are forged of Unubtanium.