Deep in the Sierra Nevada Mountain range resides the “World’s Rarest Gold Ore” – Natural Gold Enriched Quartz. The brilliant white quartz contains veins of up to 22-23 carat gold, which is the highest purity for naturally occurring gold. The world’s largest production of Gold Quartz is found in the Original 16 to 1 mine, the natural veins of gold were formed by hydrothermal pressure deep within the earth millions of years ago. All of the pieces created from the rare combination truly are unique treasures.