The Thing You Know — Amethyst Ring
The Thing You Know — Amethyst Ring
The Thing You Know — Amethyst Ring

For a clear head

The Thing You Know — Amethyst Ring

Worn for nine hundred years by people other people were relying on.

A cave that has been filling itself in for eighty million years.

£149.00£169.00

Made after you order it · up to 20 days · 925 sterling silver

Not sure of your size? Measure it in two minutes

Two minutes with a strip of paper now saves three weeks later. Everything is made after you order, so a size change afterwards means starting again.

1. Cut a strip of paper about 5 mm wide.

2. Wrap it round the base of the finger — snug, but it should pass the knuckle with a little resistance.

3. Mark the overlap, lay it flat, measure in millimetres. Find that number in the circumference column below.

Ring sizeCircumferenceInside øUKEU
4.548.0 mm15.3 mmJ48
549.3 mm15.7 mmK49
5.550.6 mm16.1 mmL50
651.9 mm16.5 mmM52
6.553.1 mm16.9 mmN53
754.4 mm17.3 mmO54
7.555.7 mm17.7 mmP56
857.0 mm18.1 mmQ57
8.558.3 mm18.5 mmR58
959.5 mm18.9 mmS60
9.560.8 mm19.4 mmT61
1062.1 mm19.8 mmU62
  • Measure in the evening. Fingers are largest at the end of the day. Measuring at 8am in January is the single most common reason a ring turns out tight.
  • Between two sizes? Take the larger. A ring you cannot get off is a worse problem than one that turns.
  • Wide bands run small. 6 mm or wider, go up half a size.
  • Adjustable pieces need no size at all — they open a little and hold.

Not sure? Email your measurement to asi8@gmail.com and we will tell you which number to choose. We would far rather spend five minutes on that than remake a ring.

The millimetres are the inside circumference of the band. Between two sizes, take the larger.

  1. 01 A stone is chosen for your order by hand, held to the light.
  2. 02 It is set in solid silver and cut to your size, finished, and checked.
  3. 03 It rests, and is wrapped by hand with its card — the stone, and the date it was finished.
  4. 04 Dispatched with tracking. Up to twenty days.
  • Free delivery, no minimum
  • Tracked worldwide
  • 14-day returns

The story

Amethyst does not form in seams. It forms in rooms.

Gas gets trapped in cooling lava and leaves a cavity. Water carrying dissolved silica seeps in over an immensity of time and crystals grow inwards from every wall, pointing at the middle, until the room is a mouth full of teeth. Break one open — some are the size of a car, some the size of a fist — and every point in there is aimed at a centre that no longer has any space left in it.

The purple is iron. A trace of it, caught in the quartz lattice and then hit by natural radiation from the surrounding rock over millions of years, which knocks the iron into a state that absorbs everything except violet.

So the colour is damage. Radiation damage, held steady for eighty million years, and we find it beautiful.

A cave that has been filling itself in for eighty million years.

Most of what you will ever see comes from Rio Grande do Sul in Brazil and from Artigas in Uruguay, either side of the same border, arguing gently about which side has the better colour. Uruguay usually wins and charges for it.


This one is straightforward — natural amethyst, silver, worn every day without a plan. It is the sister piece to the black rhodium ring and I kept both because they are not for the same mood.

925 sterling silver. Made after you order it, up to twenty days.

£129 at launch, £149 after.

Amethyst does fade in sunlight — genuinely, permanently, over years on a windowsill. Keep it in its wrapping and it will outlast you.

Materials

  • Natural amethyst
  • 925 sterling silver
  • Made to order, up to 20 days

Worn for centuries to keep a clear head. Some people feel something. Some don't. If you don't, it is still a room in a rock.

What it has been carried for

Amethyst

Two and a half thousand years of being worn by people who had to keep their head.

  1. 01
    The one everybody knows

    Sobriety

    The Greeks cut wine cups from it and drank all night on the belief that the stone would keep them clear. The name says it outright: a-methystos, not drunken.

    Greek, from the 4th century BC
  2. 02
    Less known

    Office

    From the early middle ages an amethyst sat in the ring a bishop wore, and it was kissed. Not pleasure denied - clear-headedness because other people were relying on you.

    Latin church, 11th century onward
  3. 03
    Almost nobody knows

    Rank, lost

    Until the 1700s it sat with ruby, emerald and sapphire in the top rank of stones. Brazil was opened, the price collapsed in a generation, and nothing about the stone had changed. Only how many there were.

    Brazilian deposits, 18th-19th century

All of the above is history and folklore, written down because it is real and it is interesting. It is not a claim about what the stone will do. Some people feel something. Some don’t. More in The Codex

Before you decide

Everything we can tell you

  1. 01

    The stone

    Amethyst. What we know about the material in this piece is written on the page above, in the measurements we were given. Where a stone is lab-grown or treated we say so by name. We never call a treated stone natural, and we never use the phrase “semi-precious”.

    Read what it has been carried for →
  2. 02

    The metal

    Solid 925 sterling silver. We never plate base metal, and we never describe plating as solid gold.

    How to keep it →
  3. 03

    Made after you order

    Nothing here sits in a warehouse. Work begins when the order does, and the piece takes up to 20 days before it ships. Your ring size is cut at that point, which is why we ask for it at checkout.

    Making & delivery →
  4. 04

    Size & fit

    Ring sizes run 4.5 to 10 (UK J to U). Measure warm, at the end of the day, and take the reading three times.

    How to measure at home →
  • Free UK delivery
  • 30-day returns
  • Hallmarked 925 silver
  • Nickel-safe fittings
  • Gift box included