Plating variations: yellow, rose, white, rhodium
Every week a client asks "what is the difference between Herreira's yellow gold and rose gold?". And many resellers slip — say "it is just color, a matter of taste" and lose the whole set. It is not just color. It is chemistry, skin tone, occasion. And you will leave here owning this.
Why there are different gold colors
Back to a sentence you already know from lesson 2 of module 1: 18k gold is seventy-five percent pure gold plus twenty-five percent other metals. Those other metals are what give it color. Tweaking the recipe changes the color without changing the gold content.
The basic recipe:
- Classic yellow: seventy-five gold, plus balanced copper and silver. Warm tone, vivid gold, like traditional fine jewelry.
- Rose (rose gold): seventy-five gold, but with much more copper and very little silver. The copper pulls the tone toward warm red.
- White: seventy-five gold, plus palladium and silver (in premium alloys) or nickel (in cheap alloys, not what Herreira uses). Silvery tone.
Note: the gold value is the same in all three colors. Whoever tells you rose is cheaper because "it has less gold" is wrong. The difference is in the recipe of the twenty-five percent, not in the amount of gold.
Where rhodium comes in
Rhodium is a noble metal from the platinum family. It is not a gold color — it is a protective bath applied on top of the 18k plating, usually on white pieces and on some rose pieces.
What it is for:
- Mirror shine. Rhodium reflects more than pure white gold. That is what gives the piece that luxurious finish that looks like polished silver from fine jewelry.
- Anti-oxidation. Protects the copper and silver in the alloy underneath from oxidizing and yellowing the piece.
- Light scratch resistance. Rhodium is harder than 18k gold, so the surface layer handles daily friction better.
The rhodium layer is thin (half a micron to two), but it is what keeps a white piece white for years. Without rhodium, a white gold piece slowly yellows.
How to match the client's skin and outfit
Here is where the sale happens. You are not selling color — you are selling the right piece for her.
- Light skin, pink undertone: rose fits like a glove. Blends in like an extension of the skin.
- Olive skin, yellow undertone: classic yellow brightens, rose also works, white sometimes disappears.
- Dark skin, olive or red undertone: warm yellow is pure luxury, white/rhodium creates beautiful contrast.
- Black, silver, executive outfit: white with rhodium pairs without competing.
- Colorful, festive, Brazilian outfit: yellow is the right tone, rose for more delicate occasions.
When the client is unsure, hold the piece against her wrist near natural light. Her skin will tell you.
The question that closes the sale
"Do you wear more white, yellow or rose pieces these days?" If she says "more silver", you offer white with rhodium. If "yellow, always", offer classic yellow. If "I am curious about rose", that is your chance to show the set. You are respecting her style, not imposing yours.
Pocket sentence
"The color of 18k gold comes from the twenty-five percent of other metals — the gold is the same. Rhodium is the mirror shine that protects a white piece for years."
What to practice this week
Look at your kit and separate three pieces identical in shape but different in color (yellow, rose, white). Practice presenting the three to an imaginary client in under ninety seconds. End with "which of these three matches you most today?". Whoever offers choice sells more.