👉 Warwickite is a type of quartz mineral that is often referred to as "the stone of war," due to its ability to reflect light in various colors, including blue, green, and red. It's also known for its high refractive index, which allows it to spread light through the air at a much slower rate than other minerals like diamond or diamond-like carbon. Warwickite is often used as a decorative stone in jewelry and can be found in many different colors and forms.