De Beers� two-month diamond budget isn�t forever

Now another diamond company has come up with a novel way of devising a ring budget, based not on income, but on how much is left each month. 

Mint Diamonds, a Texas-based online retailer of custom rings, says purchasers should be able to pay off their engagement rings within a year. To this end, they should calculate their “net-net” monthly income  what remains after a host of common expenses and multiply it by 12. So in 12 months, their disposable income will pay for their diamond.