Aquarius birthstones

The main stone: Amethyst

Amethyst is quartz, and the purple is iron trapped in the crystal and then altered by natural radiation in the surrounding rock over a very long time. That origin explains its single real weakness: strong sunlight runs the process backwards, and an amethyst left on a bright windowsill for a few years drifts towards grey or colourless. It is the only stone on the zodiac table that can be damaged by nothing more than being displayed.

The name is Greek - a-methystos, “not intoxicated” - from a belief that the stone kept its wearer clear-headed at the table, which is why Greek and Roman drinking vessels were carved from it. A superstition rather than a fact, and worth saying so. What survived into the correspondence tables is the reading attached to Aquarius: clarity, and the knack of standing slightly outside a situation to see the shape of it.

Until the nineteenth century amethyst ranked among the most valuable gems in Europe, and then enormous Brazilian deposits were found and the price collapsed. Nothing about the stone changed. It is the clearest demonstration on this site that what a gem costs is a fact about supply rather than about the gem - a good amethyst today looks exactly like the one in a medieval bishop’s ring and costs less than dinner.

Other Aquarius stones

Aquamarine is emerald’s sibling in the strictest sense: both are beryl, the same mineral species, separated only by which trace element got into the crystal. Iron gives this one its blue-green; chromium would have made it an emerald instead. The tradition gave Aquarius the cool transparent one, which suits a sign the older books describe in terms of distance rather than warmth.

In daily terms it is the more wearable of the two - Mohs 7.5 to 8, no fading, tolerant of a normal life in a way amethyst is not. Colour is graded by depth: most material is very pale, and the deep sea-blue stones cost several times more. Nearly all of it is heated to remove a greenish cast, a permanent and routine treatment that nobody bothers to hide. If you came here from a month chart and were handed garnet, the calendar’s reasoning is on the January page.

How to choose and wear it

One rule outweighs everything else on this page: keep the amethyst out of the sun. Not out of daylight, but out of hours of direct sunlight - so not on a windowsill, not on a car dashboard, and not worn all day for a fortnight on a beach. The fading is gradual, cumulative and irreversible, and it is far and away the commonest way people damage this stone without noticing they are doing it.

Past that, both are easy. Warm water, mild soap, soft brush; ultrasonic cleaners are fine for a clean aquamarine and best avoided with a heavily included amethyst; keep them apart from anything harder in the drawer. If it is going to be one piece rather than two, the pragmatic division is amethyst for evenings and aquamarine for the rest of the time.

Why sources disagree on the stones

Lists of stones for Aquarius differ from book to book and shop to shop - and that is normal: there is no single canon. The astrological tradition derived stones from ruling planets and elements, the jewellery tradition from the month of birth (the American birthstone table of 1912), and shops happily add to the lists whatever sits in the display case.

We fixed the overlap of the most common lists - the core that repeats most often. If another source names a different stone for you, neither list is wrong: pick the stone from the tradition that you actually like.

The sign and its stones at a glance

Frequently asked questions

Matching stones to zodiac signs is a tradition, not science: there is no single canonical list, and schools disagree. Stones do not heal and do not guarantee events - for health questions, see a doctor. A stone here is a symbol and a reminder, nothing more and nothing less.