Opal

Opal is a hydrated amorphous form of silica, known for its unique display of flashing rainbow colors.

Part of speech: noun
Definition: Opal is a precious gemstone primarily formed from silica and water, categorized by its distinctive play-of-color, showcasing various colors in different lighting conditions. This play-of-color is caused by the diffraction of light off the internal structures of the opal, varying significantly from one gemstone to another, making each opal unique. Predominantly mined in Australia, opals can also come from places like Ethiopia, Mexico, and Brazil, each location producing opals with characteristic colors and patterns. Due to their relatively high water content, opals can be sensitive to changes in temperature and humidity, requiring careful handling and storage. The beauty and uniqueness of opals have made them highly valued for jewelry-making, embodying a range of colors and patterns that appeal to a wide audience.