January garnet, February amethyst, March aquamarine, April diamond, May emerald, June alexandrite and moonstone, July ruby, August peridot, September sapphire, October opal and tourmaline, November citrine and topaz, December tanzanite and turquoise.

Because there are two lists. The modern list was standardised in 1912 and revised since; the traditional one goes back centuries and varies by country. Where a month shows two stones, one is usually modern and one traditional — both are correct, and you pick the one you like.

Of course. Most people choose by colour or by what a stone is said to carry rather than by their birth month, and a stone you're drawn to will always suit you better than one you were assigned.

Each carries associations people have attached to it for a very long time — amethyst with calm and clarity, garnet with constancy, peridot with renewal, moonstone with intuition, citrine with abundance.

Yes, these are natural gemstones, set in sterling silver, fine silver and 18K gold.

t's one of the few gifts that's personal without being a guess — you only need to know the month. Every piece arrives ready to give, and orders over $150 come in our Experience Box.