





Black fire opal is a variety of precious opal characterized by a dark base color—ranging from deep gray to jet black—caused by trace elements like carbon and iron oxides present during its formation. This dark background enhances the gemstone's vivid flashes of color, known as "play-of-color," which can include reds, greens, blues, and yellows. The most sought-after specimens display intense red hues, often referred to as "red on black,"
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