Citrine occurs naturally in a wide variety of yellow colors, all of which are caused by varying quantities of iron in the Citrine crystal structure. We often see pale or almost colorless Citrine. With higher quantities of iron, we see orange, wine-yellow, honey-yellow, and saffron (reddish)-yellow specimens, while others have quite a pronounced brown tinge.
 
Robert purchased quite a few Citrine crystals from a mining resource in Brazil. 
We've faceted many of them.  However, in this case, we set one of these natural Citrine crystals "as is" in a Sterling Silver Pendant.