CAMBRIDGE, Mass. — The first blue pigment to hold its color was often prized over gold. The semi-precious stone lapis lazuli was ground into an iridescent pigment, sometimes called ultramarine, that ...

Medievalists may have to reconsider long-held assumptions about who, exactly, painted all those gorgeous illuminated manuscripts. The intricate role of the scribe has been popularly attributed to ...

Lapis Lazuli is known for its special look. The color blue represents trust. It's the color of the sky, which is expansive and symbolizes freedom. Among spiritual circles, the Lapis Lazuli has been ...

What Anita Radini noticed under the microscope was the blue—a brilliant blue that seemed so unnatural, so out of place in the 1,000-year-old dental tartar she was gently dissolving in weak acid. It ...