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 ...
Lapis lazuli, with its brilliant blue hue and gold-like flecks, was a gem treasured beyond measure in ancient Egypt — a legacy that endures in modern ornaments and jewelry. This striking stone, ...
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