A diamond is not judged simply by its size but by its lack of flaws as you will quickly learn when you shop at a local diamonds retail store. When you first get to pick a diamond for a wedding ring especially, you will most likely choose to go to a jeweler who will let you choose from a selection of loose diamonds before selecting the setting of your choice. These jewelers are not typically found in mall jewelry stores who sell diamond rings already set, but are private jewelers who will allow you to select a diamond and let you look through their glass to check for flaws. A flawless diamond is an investment. A diamond with flaws may be sold to you for as much money as a flawless diamond but will never appreciate in value or even be worth what you paid for it, if you ever tried to resell it for whatever reason. Before you enter into a diamond deal you should be aware of what to look for. Look for a flawless diamond, which means there are no internal cracks in the diamond and that it is less likely to break or crack. Look into the color of the diamond, which should be on the bluish side rather than casting a yellow haze. All of this information will give you a little bit of the upper hand in buying a diamond from a local diamonds retail store. Most people assume that their dealer is trustworthy, but, unless you get a good look at your diamond yourself, you are depending on his word. Of course, if you are shopping at a local diamonds retail jewelry store for diamond necklaces, the elegance of the piece might get the better of your cautious nature. Regardless of the sheer beauty of diamond necklaces, one should ask the usual questions about possible flaws, color and resale value. Your diamond necklaces are an investment only if they are worth their price in resale value.