The Herkimer Diamond is a natural fairy tale. Born of the earth in New York and displayed in this elegant setting, the quartz crystal known commonly as a Herkimer Diamond is sure to catch the eye of anyone close by. It makes the perfect gift for sisters, best friends, and or special woman in your life. Shown in gold filled, it is offered here in solid 18k white, rose, and yellow gold. The ring shown has been purchased, it featured a 2.5 carat stone, and was about a size 5 ring. Customize Your Own! :) The last photo shows the beautiful quality of stones that will be used to design your ring, and examples of stones to show the various carat sizes. Select your ring and carat size, and we will set your ring just for you. As with all meaningful jewelry sold by Gold Silver and Gems, wear with care. Carat sizes listed are approximate, and are used to indicate general size/dimensions of stones used. Price is not based on carat size, but on multiple factors considered when assessing the value of each product including the amount of materials and time needed to create pieces of a larger size. About Herkimer Quartz Diamonds: Herkimer diamonds are not actually diamonds, but are double-terminated quartz crystals of exceptional clarity (water-clear) discovered within exposed outcrops of dolostone in and around Herkimer County, New York and the Mohawk River Valley. They're called "diamonds" not only because of their clarity, but also because when they are found, they look like someone faceted them--but they are naturally "faceted" with double termination points, and 18 total facets (six on each point, six around the center). (Source: Wikipedia.org)