The Engagement Ring!
Metal: Palladium
Stone: Tanzanian ethically mined ruby
Engraving: <3 = ♥ = U+2665; 2665hex = 0010011001100101bin
Design: Alice Rochester of +Harriet Kelsall Jewellery Design

Why ruby? Because: http://cybette.jaikuarchive.com/presence/44842215#c-1583783 - Jaiku users might appreciate (as backstory, that link is an archive of how we hooked up) :-D

More photos: http://www.flickr.com/photos/myrtti/tags/engagementring/