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 ...

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 ...

I examine the polished Lapis Lazuli, its rich blue surface sparkling with golden pyrite. The stone emanates a quiet wisdom. Lapis Lazuli, with its deep blue color and golden flecks of Pyrite, is a ...

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 ...