Natural Australian Red Opal
Natural Australian red opal represents the absolute pinnacle of gemstone rarity and market value. Because red requires the largest silica spheres to form, it is the most difficult color to produce in nature. Our collection features untreated solid red opals mined directly from Lightning Ridge and Queensland.
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Black Opal 9.82ct Certified Neon Rainbow Fire Butterfly Wing
Original price was: US$22,640.US$18,900Current price is: US$18,900.
5.12ct Solid Black Opal Oval Rolling Rainbow Pattern
Original price was: US$20,000.US$16,000Current price is: US$16,000.
The Geology of Silica sphere Sizes and Red Play of Color
To understand why red is the most valuable color in the opal spectrum, one must look at its sub microscopic physics. Precious opal is composed of tiny, regularly arranged spheres of silica dioxide. These spheres act as natural diffraction gratings, bending and breaking white light into different colors.
The smallest spheres, approximately 0.1 microns in diameter, diffract light to produce violet and blue. To produce red play of color, the spheres must grow to approximately 0.2 microns – a highly specific, stable geological condition that occurred only rarely during formation. Consequently, red dominant solid stones are extremely scarce. At Opal Galaxy, every red opal is guaranteed solid and untreated, offering outstanding value for custom jewelry or private collections.
Frequently Asked Questions
Why is red opal the most valuable?
Red is the rarest play of color, and its presence adds a significant price premium in the market.
Where are red opals found?
The finest red play of color occurs in Lightning Ridge black opals and Queensland boulder opals.
Are these red opals color enhanced?
No, every red opal in our collection is 100 percent natural and untreated.