Gemstone Guide2026-06-19
Alexandrite: Meaning, the Colour-Change Magic, and Why It Is June's Rarest Birthstone
Alexandrite is the gem that turns green in daylight and red under a lamp, the stone jewellers call emerald by day, ruby by night. It is also rarer than diamond and one of the most faked gems on the market. Here is the honest guide to what alexandrite means, how the colour change really works, the Russian imperial story behind its name, why it became June's third birthstone, what fine alexandrite actually costs, and how to avoid the synthetic stones that are sold as the real thing every single day.
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