Labradorite

Labradorite is an important feldspar gemstone. Labradorite gemstones usually have a dark base color with metallic-looking color plays of blue, green, yellow, and red. ... This iridescent effect is commonly known as labradorescence, and is named after this stone

The gemstone creates a shield for auras and protects against negativity of the world. Labradorite is said to temper the negativity within ourselves as well. Labradorite is known for its changing colors, so it is no surprise this gemstone is known as a stone of transformation, enhancing strength of will and inner worth.