In honor of this month's magical birthstone, Bonhams & Butterfields is dedicating an entire auction to opals, from fiery Mexicans to cool Australians. There's even an opal hat. Read More
Known as the "king" of gems in Ancient Rome, sapphire is still most coveted in deep blue - like the stunning parure Christie's Dubai will auction off next month. But sapphire comes in a rainbow of colors and, increasingly, creative jewelers are getting their hands on those. Read More
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