This coaster depicts the logo of Mendicant Bias, the rogue Contender-class Ancilla (or AI) from the Halo series of games
If you don't have a 3D Printer and you want one of these coasters please send me a DM and we can arrange for me to print one for you :)
Also check out my Etsy store - www.etsy.com/uk/shop/enterprisexddesign