Circular has swapped the plastic shell in the old ring for titanium which is available in four finishes: black, silver, gold, and rose gold. The ring’s sensors have been given a complete ...

Ultrahuman Rare is a luxury smart ring with 18K gold and 95% platinum options, a significant upgrade from titanium. The Rare smart ring features motion sensors, heart rate monitoring, and other ...

We speculate that titanium dioxide in cosmetics and sunscreens may adsorb gold particles in jewelry that occasionally contacts these areas and cause contact dermatitis on facial skin despite the ...