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 ...
Ultramarine blue, or "true blue," was once more valuable than gold. In 1824, a synthetic version called French ultramarine made the color more accessible. But ultramarine blue made from real lapis ...
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