Opal is a white-colored semi-precious gemstone. The term crystal opal basically refers to any category, such as semi-black, white or black opal. Opals showcase so many colors including most of those found in rainbow colors. Opal is one of the most famous gemstones in the world and is the birthstone of the month of October. Water flows into the cracks and turns into silica opal millions of years later. Opal is softer and easier to chip than other popular gemstones. The Precious forms of Opal occur in a wide variety of colors, including white, yellow, red, orange, green, black, and blue.
Some opals have an internal structure, consisting of regularly packed spheres, which enables them to act as a diffraction grating and to distinguish light into its component colors. This phenomenon is called "play-off-color". Although these features are weak, they become a gem.
Crystal healing believers see this as a stone that promotes peaceful security. They also thought that those who wore this stone would be encouraged to express their true nature. European cultures have long believed that the opal is a symbol of hope, holiness, and truth.
Opal is found in a wide range of investments around the world. Opal is found in many places, from Cornwall to Canada, Australia, Siberia, Ethiopia, and Madagascar.