I don't know many computing Grannies so perhaps offering this diamond scattered mouse as ''A perfect gift for a 60th wedding anniversary, as diamond is the traditional gift for this event" may not work. Still, you never know. The world's most expensive mouse comes in white, red or yellow gold with 59 brilliant-cut scattered diamonds or a diamond flower design or you can have it with black or white trim. Does it actually work as a functioning mouse though? Yes, it's a three button optical wheel mouse, compatible with MAC or PC, has a resolution of 800dpi and comes with a three year warranty. The price is a mere £12,400/ US$24,180
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