when shopping for a diamond the best way to get exactly what you are paying for is to purchase a GIA certified diamond. The price of a GIA certified diamond will be a little higher than a diamond certified by other certification companies such as EGL, AGS ,HRD and IGI but GIA has been more accurate in certifying diamonds. Jewelers know they can look at a GIA certification and trust what the certification read. So when buying ask for a GIA certified diamond you will pay more but you will know exactly what you are getting.
The first thing you need to figure out when buying a diamond is a budget. Before one even starts searching for a diamond a budget needs to be set that you are comfortable with. A diamond is a major purchase that lasts forever so what might seem like a high price really is not when you factor in the cost over years of ownership. You are the only one that can make the decision of what to spend on your diamond you should not base this on what a friend, relative or colleague spent on their diamond. Make your diamond purchasing experience a memorable one not a life lesson.