diamond store have traditionally been graded using the 4 C’s. Carat weight is simply the weight of diamond dealers. Color and clarity are important when determining the rarity of diamond dealers. Cut is the C that helps determine the Light Performance of diamond dealers.
Pink and blue diamonds are especially popular and have been sold at higher dollars per carat than any other loose gemstones in history. Red, green, and purple diamond dealers are among the rarest of the rare.
With a 10 power diamond loupe, a gauge, the proper light and some experience you may be able to approximate the size and quality of diamond stud.