This three-part series of articles reviews our current understanding of gemstone coloration ... such as the play-of-color in opal and the blue sheen of moonstone feldspars.

A s antiques enthusiasts continually seek items from bygone eras for their quality and character (and for psychological ...

Horoscope Today, January 12-18, 2025 to know your astrological predictions. Anticipate a week filled with positive shifts.