Oxidation in jewelry (patina)

Oxidation in jewelry refers to a chemical reaction between metal and oxygen in the air, often in combination with moisture and other environmental influences. This forms a patina or discoloration on the surface, making the metal appear darker or duller.

Commonly affected metals:

• Silver: Forms silver sulfide with sulfur compounds from the air, which becomes visible as a black or dark discoloration.
• Copper & Brass: Develop a greenish or brownish patina through oxidation processes.
• Bronze: Can develop a green or blue patina.
• Gold (low carat, e.g., 9K or 14K): Can also discolor due to alloy metals (e.g., copper).

Note: In our shop, you will only find high-quality precious metals. Nevertheless, without coating, oxidation can occur depending on skin type and environment!

Advantages of oxidation:

• Creates a vintage or antique look.
• Can be intentionally used to highlight details in engravings or embellishments.

Disadvantages of oxidation:

• Jewelry often looks tarnished or unkempt.
• Can cause skin discoloration (especially with copper or brass alloys).

Prevention and removal:

• Regular cleaning with silver or metal polishes.
• Storage in airtight bags or with anti-tarnish cloths.
• Home remedies like baking soda, lemon juice, or vinegar can remove light oxidation marks.

Help through anti-oxidation coating

An anti-oxidation coating is a special protective layer applied to jewelry to prevent or slow down the natural oxidation and tarnishing of the metal. These coatings act as a barrier against oxygen, moisture, and other environmental influences that lead to chemical reactions and discoloration.

Types of anti-oxidation coatings:

1. Rhodium plating
   • Especially used for silver and white gold jewelry.
   • Prevents oxidation and gives a shiny look.
   • Wears off over time and can be renewed.
2. Lacquer or protective coating layers (e.g. clear coat, nano-coatings)
   • Forms an invisible protective layer on the piece of jewelry.
   • Often used for brass, bronze or copper.
   • Can peel off over time and needs to be renewed.
3. E-coating (electrophoretic coating)
   • A transparent or slightly tinted protective layer.
   • Very durable and protects against corrosion and discoloration.
   • Often used for fashion jewelry.
4. Gold or Silver Plating (Gilding, Silver Plating)
   • A thin layer of precious metal protects the underlying metal.
   • Helps to delay oxidation, but wears off over time.
5. Wax or Oil Sealing
   • A temporary solution, especially used for copper or bronze.
   • Needs to be renewed regularly.

Advantages of an anti-oxidation coating:

✅ Prevents tarnishing and discoloration of jewelry.
✅ Extends the lifespan and shine of the metal.
✅ Reduces skin reactions (e.g., green discoloration from copper alloys).
✅ Saves cleaning effort.

Disadvantages:

❌ Coating can wear off over time.
❌ Can be damaged by chemicals (e.g., perfume, sweat, cleaning agents).
❌ Some coatings change the natural look of the metal.

All our jewelry pieces receive the best finishing through proper processing and optional extra coating: