Agate is such a nice all round crystal, it works gently helping you center yourself & stay connected with the earth.
Great at helping maintain focus & feel grounded - a good support crystal in times of stress & when dealing with loss.
When a crystal is aurified it is put into a vacumn with precious metals, containing but not limited to silver, gold, platinum & rhodium giving it its luminous glow, and really amping up its properties.
Your specific piece will be intuitively chosen for you.