This pendant depicts the Eye of Agamotto worn by Dr Strange, also containing the Time Stone in the MCU. Also included is the Presentation Box based on the window from the Sanctum Sanctorum. You will, of course, need to source the neck chord.
If you don't have a 3D printer but you'd really like one of these please send me a DM and we can arrange for me to produce one for you, or check out my Numonday store:
Or on my eBay page: 'enterprisexddesign2016' (formal shop to come)