I found a diamond at a local B&M store, but this is as far as my pricescope education takes me. I am getting it set in an 18k gold ring with two 5x3 pear shaped rubies on the side (.51ct total). The rubies are a "good quality" whatever that means, all I can tell is that the color is a very deep red. All in all the ring is costing me $840. What kind of services should the store be offering me (routine maintenance, money back guarantee, etc.)? I don''t really know what to expect so I was wondering what was typical.