What Does 585 Mean on Jewelry?
If you look inside a ring, on the back of a pendant, or near the clasp of a necklace, you may find a tiny number stamped into the metal:
585
At first glance, it may look like a serial number.
It is not.
In most cases, 585 is a gold fineness mark that tells you how much pure gold is contained in the alloy.
What Does 585 Mean?
A piece marked 585 contains approximately 58.5% pure gold.
That corresponds to 14-karat gold.
So, in general:
585 = 14K gold
The remaining approximately 41.5% is made up of other metals that help give the alloy its color, strength, hardness, and workability.
Why Is 14K Gold Marked 585?
Gold can be described in two common ways:
Karat system
- 24K = pure gold
- 18K = 75% gold
- 14K = approximately 58.5% gold
Fineness system
- 999 or 999.9 = nearly pure gold
- 750 = 75% gold
- 585 = 58.5% gold
The fineness system expresses gold content in parts per thousand.
That is why 58.5% gold is written as 585.
Is 585 the Same as 14K?
For practical jewelry purposes, yes.
You may see a 14K piece marked:
14K
14KT
585
All three can indicate approximately the same gold fineness.
The difference is mainly the marking system being used.
Why Do Some Pieces Say 14K and Others Say 585?
Different countries and manufacturers use different hallmarking conventions.
In the United States, 14K and 14KT are very common.
In many European and international markets, numerical fineness marks such as 585 and 750 are commonly encountered.
Vintage and imported jewelry can therefore have markings that look unfamiliar even when the underlying gold content is familiar.
Does 585 Always Mean Solid 14K Gold?
This is where you should slow down and read the entire hallmark.
A simple 585 mark can indicate 14K fineness, but jewelry markings should never be interpreted from one number alone if other letters or symbols appear next to it.
For example, a piece may contain markings that indicate:
- plating
- gold filling
- rolled gold plate
- manufacturer information
- assay or origin marks
The complete stamp matters.
Jeweler’s Note
When I inspect a piece of jewelry, I do not stop after spotting one familiar number.
I look at every letter, number, and symbol around it.
A hallmark is best read as a complete sentence rather than a single word.
What Does 750 Mean?
750 means the alloy contains approximately 75% pure gold.
That corresponds to:
18K gold
So:
585 = 14K
750 = 18K
These are two of the most common fineness marks you may encounter in fine jewelry.
What About 417?
You may also see:
417
This corresponds to approximately 41.7% pure gold, or 10K gold.
A simple reference is:
| Mark | Approximate Gold Content | Karat |
|---|---|---|
| 417 | 41.7% | 10K |
| 585 | 58.5% | 14K |
| 750 | 75% | 18K |
| 916 | 91.6% | 22K |
| 999 | 99.9% | 24K |
Is 585 Gold Real Gold?
Yes.
14K gold is real gold.
It simply is not pure gold.
Pure gold is relatively soft, so jewelry is often made using gold alloys that combine gold with other metals.
Those additional metals can affect:
- color
- hardness
- durability
- casting behavior
- finishing
- price
That is why both 14K and 18K are widely used in fine jewelry.
Does 585 Tell You Whether the Gold Is Yellow, White, or Rose?
No.
The 585 mark tells you the gold content, not the color.
14K gold can be made as:
- yellow gold
- white gold
- rose gold
- other specialty alloy colors
The final color depends on the metals combined with the gold.
Can Two 585 Gold Rings Look Different?
Absolutely.
Two rings can both be marked 585 and still have noticeably different colors.
Why?
Because both contain approximately the same percentage of gold, but the remaining alloy composition can differ.
One 14K yellow gold alloy may appear warmer or deeper than another.
The hallmark tells you the fineness.
It does not tell you the exact alloy recipe.
The Simple Answer
If you find 585 stamped on a piece of jewelry, it generally means:
58.5% pure gold, equivalent to 14K gold.
But always read the entire hallmark before deciding exactly what the piece is made from.
Small markings can carry a surprising amount of information.
Jewelry Field Notes
Jewelry Field Notes explores jewelry materials, construction, gemstones, techniques, terminology, and practical industry knowledge from the perspective of a working jeweler.