Labradorite
Labradorite is a type of feldspar mineral that displays a unique iridescent optical effect, known as labradorescence. This phenomenon causes the stone to exhibit vibrant flashes of color when viewed from different angles. Labradorite is typically gray, green, or blue in color, with the iridescent sheen ranging from golden yellow to peacock blue. It is commonly used in jewelry and decorative items due to its striking appearance.