Ametrine

Ametrine's name is a merging of the Amethyst's and the Citrine's names, as it is a mixture of those crystals. Its colours switch from purple to yellow or orange hue. It rarely occurs in nature, the only known and well-confirmed place where you can find this gem is Bolivia near the Brazilian border. 

As it is a blend of two powerful crystals, Ametrine has a complete balance of energies. The gem relieves tension, brings serenity, stimulates creativity, and balances mental stability and self-confidence. Use it when you are feeling mentally sluggish, foggy or unable to concentrate. Especially if you are studying the stone will stimulate your brain, improves learning and creative problem solving and aids in memory and information retention. 

Ametrine is considered a double boost to remove toxins from the body, as both amethyst and citrine are detoxifiers. It assists with digestive issues and helps to stimulate metabolism. For this reason, this crystal can be a valuable aid in weight regulation and in making proper food choices. 

Country of origin: Bolivia 
Chemical composition: SiO2 
Hardness based on Mohs scale: 7. 

Crystal and gemstone meanings, Detailed Ametrine properties