When Amethyst heats up in the ground (or in the sun), the lavender turns yellow.  If it only partially changes, the beautiful result is a combination of amethyst and citrine, with a unique blend of the energies of each.

Ametrine meaning:

Think of Ametrine as the fair-haired goddess of light and health.  Numerologically, Ametrine is the master number 33: the vibration of love expressed as compassion.  Ametrine crystal likes to inspire and spreads its light.  Ametrine possesses the calm contemplative nature of amethyst and the ability to transmute darkness into lightness feature of citrine.

Ametrine crystal encourages the wearer to maintain faith in herself.

Hands-down, Ametrine is the best crystal for addressing the flu-like symptoms of Chronic Fatigue Syndrome.