Amethyst

Spiritual awareness, psychic abilities, inner peace, positive transformation. relieves stress. Guards against psychic attack, transmuting energy into love and protecting the wearer. Relieves stress, soothes irritability. Encourages sobriety, especially with alcohol. Supports selflessness, spiritual wisdom. Boosts hormone production. Eases headaches. Cleanses the blood, destroys malignant tumors, regenerates tissue.   

 When heated to more than about 300-400 °C, amethyst loses its violet color and often turns yellow, orange or brown, and then resembles the quartz variety citrine. However, depending on the locality and the temperature during the heat treatment it may also turn colorless or - rarely - green (Rose and Lietz, 1954; Neumann and Schmetzer, 1984). 

Said to relieves stress.  foster spiritual growth and awareness. Supports creativity. Healing of mind, body, and soul. Strength and alignment. Balance. Soothes emotions and relieves depression. Promotes acceptance of others. Instigates change and eases transition. Strengthens nerves Relieves mental and emotional exhaustion. 

 Ametrine crystals are made of alternating sectors of purple and yellow to orange color. Slabs cut perpendicular to the c axis of the crystal look a bit like a pinwheel. The purple sectors are situated under the positive rhombohedral faces (r), and the yellow sectors under the negative rhombohedral faces (z).

While the purple sectors are made of amethyst, the yellow or orange sectors are not made of citrine, because they are colored by inclusions of iron compounds and would more properly called ferruginous quartz. Accordingly, upon heating ametrine the purple sectors pale, while the yellow-orange sectors keep their color.

Ametrine has been synthesized hydrothermally in Russian laboratories (Balitsky et al., 1999). 

Inspires truth, sincerity, honor, self love, eloquence, integrity, trust, clairvoyance, prophecy, psychic vision. A stone to clear the mind of excess mental chatter. Soothes the nervous system. Helps one see both side of a situation. Eases emotional trauma. Protects against electromagnetic pollution and absorbs microwaves. Relieves muscle spasms.

A green to blue-green variety of K-feldspar, usually microcline, but sometimes applied to orthoclase.

The color is usually caused by an elevated content of Pb (up to 1.2% PbO, [2]).
However, there are also indications that the green color of some microcline is caused by divalent Fe[1]. Overenthusiastic uses of this name include giving this name to slightly gray-green hues in microcline that are often photosensitive and turn from greenish gray to light smoky gray. Sunlight can sometimes enrich the color of genuine amazonite.