The wearable-tech company Ultrahuman has debuted the Rare smart ring, which is hand-crafted with 18-karat gold and platinum.

or platinum rings to house shiny diamonds in luxury jewelers’ displays. The fluctuation of demand in relation to the latest mining, processing, and refining technologies are then married to further ...

is the world’s foremost authority on diamonds, colored stones, and pearls. A public benefit, nonprofit institute, GIA is the leading source of knowledge, standards, and education in gems and jewelry.

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