Black gold in jewelry
Black gold is gradually making its way into jewelry so that more and more rings and black gold jewelry are found in online shops without ever really knowing what black gold is.
Since we can read a lot of nonsense online about it, it was time to write an article and clearly explain that :
Black gold is not a material but a plating, surface coating offering interesting options that we will detail here.
What is black gold ?
Black gold is gold (of any color and title) covered with black rhodium plating.
To understand, here is the detail :
If you are familiar with the different colors taken by gold alloys, then you know that gold color is obtained in two ways :
- or else by alloying with another metal that gives it its color in the mass to the gold alloy
- or by depositing a plating (a metal surface coating) which gives it a superficial color.
Yellow gold, pink gold and gray gold are gold-colored alloys tinted in the mass, you can file them and their color remains identical to the heart as on the surface.
Two tone gold diamond ring in black gold from our collection of wedding rings for women
White gold is obtained by depositing a rhodium plating that gives it a color so white.
Well, black gold is like white gold, but black.
A layer of black rhodium is deposited by electrolysis on our gold jewel to change the color.
How do we do it ?
Fleur de lys signet ring in black gold, from our signet ring collection
By what process does one obtain a jewel in black gold ?
The electrolysis process, well known to college students allows us to deposit dissolved rhodium in a solution on a jewel by circulating an electric current following the following assembly :
Schematic diagram of a rhodium deposit by electrolysis on a gold jewel
In a container, our solution (yellow here) containing ionic black rhodium.
Our gold jewel is wrapped on a copper wire connected to a power source.
While our anode is immersed in the solution, it is also connected to the power source.
Let it work for a few minutes so that the whole piece is well plated with black rhodium.
The longer the immersion time, the larger the deposit layer.
Ring being rhodium-plated in an ionic bath of black rhodium
The conventional thickness of such a deposit is of the order of a few microns only.
Advantages and limits of black gold
The black gold that we have previously detailed is the only method that allows you to wear a ring or jewel of black gold jewelry.
With a deep black glossy appearance, the rendering is inimitable, add white or black diamonds and the style of your jewel will be exceptional.
If you want to change the look of your ring or wedding ring, you can simply go see your jeweler to transform your ring into yellow or white gold in black gold.
White and black gold wedding ring for men from our wedding ring collection for men
But, because there is always a but.
Although rhodium is a particularly abrasion-resistant metal, it will always end up peeling, it's a matter of time depending on the care you bring to your jewel.
As such, a pendant in black gold will remain intact much longer than a ring or a bracelet because of the blows and rubs that constantly undergone them and that always end up damaging the black rhodium layer, letting appear color real gold constituting your jewel.
Wedding ring 3 Gold for men (White, Yellow and Black Gold) from our wedding ring collection for men
It is therefore necessary to foresee that one day you will have to remake the layer of rhodium of your jewel at a jeweler, or ask him to remove it completely, according to your wish.
Because of this limitation, it is advisable to use black gold in the hollows of the design of your ring and not on smooth rings.
From one you will get beautiful effects of contrasts.
And on the other hand, the black gold located in the hollows will not be subject to shocks and friction.
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