[0xcafecafe]

Not diamond but bought a 3 karat moissanite pendant necklace for my wife a few years back. Being synthetic it had a perfect crystal structure leading to a glow/reflectiveness hard to get in diamond without breaking the bank. It still looks good and wife loves to wear it.

Bought it at a local helzberg store.

[aidenn0]

SiC (moissanite) is also birefringent which makes it look a lot more sparkly (each incident ray of non-polarized light is split in 2, so if illuminated by a single bright light source you get twice as many sparkles).