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Precious Metals:

Gold

Gold

Purity

Pure gold is too soft for everyday wear, so it is alloyed with a mixture of metals like silver, copper, nickel, and zinc to give it strength and durability. Karatage, denoted by a number followed by "k" indicates purity, or how much of the metal in a piece of jewelry is gold. Karatage is expressed in 24ths, making 24k gold, 100% gold..

Yellow Gold

Natural gold and color-saturated alloys are what give yellow gold jewelry its rich shine. The alloys most commonly used, are copper with a red hue, and silver featuring a green hue. An expert mixture of copper, silver and pure gold gives this precious metal its signature warmth.

White Gold

A silvery white character is what makes white gold jewelry so appealing. In order to make the gold white, it is combined with metal alloys that are white in nature and plated with an extremely hard element called rhodium. Although strong, rhodium may wear away over time. Replating is a simple process that can be done to restore whiteness to your jewelry.

Rose Gold

The beautiful pink hue of rose gold jewelry is created by using a copper alloy. Again, the overall percentages of metal alloys is the same for rose gold as it is for yellow or white, there is just a different mixture in what alloys are used.

Sterling Silver Diamond Ring

Silver

Color refers to a diamond's lack of color, grading the whiteness of a diamond. Color grade of D is the highest
Platinum Ring

Platinum

A diamond's cut grade is an objective measure of a diamond's light performance, or, what we think of as sparkle. Dimaonds cut with the proper proportions, light is returned out of the top of the diamond (which gemologists refer to as the table).