What other metals are in my handmade recycled 9ct yellow gold jewellery?

The recycled 9ct yellow gold I use to make my jewellery, like all 9ct gold alloys, typically consists of the following metals in approximate proportions:

1. Gold (37.5%):

• 9ct gold contains 37.5% pure gold by weight. The remaining 62.5% is composed of other metals to create the alloy.

2. Copper (Approx. 44.4%):

• Copper is the primary metal added to yellow gold alloys. It contributes to the warm yellow color and provides durability.

3. Silver (Approx. 10.3%):

• Silver is added to enhance the yellow tone and improve the alloy's workability and brightness.

4. Zinc (Approx 7.7%):

• Zinc is often included in smaller amounts to assist with the casting process and improve the alloy's strength and corrosion resistance.

This information has been provided and confirmed by the manufacture to myself.

These proportions may vary slightly depending on the specific formulation or manufacturer, but the general composition will always align with the above. This alloying process gives 9ct yellow gold its characteristic durability, workability, and classic yellow appearance while maintaining affordability compared to higher carat golds.

How can I guarantee this?

Testing precious metals in the UK is essential to ensure that jewellery and other items meet legal requirements and are accurately described. This process is primarily conducted by the UK's Assay Offices, which are authorised to test and hallmark precious metals.

I only purchase precious metals, chains and finding from reputable bullion dealers and suppliers who adhere to see laws and standards.

What testing methods do The Assay office use?

2. Testing Methods Used by Assay Offices

There are four Assay Offices in the UK: London, Birmingham, Sheffield, and Edinburgh. They use the following methods to test the purity of precious metals:

a. X-Ray Fluorescence (XRF)

• What it is: A non-destructive testing method that uses X-rays to determine the metal content.

• How it works: The item is exposed to X-rays, and the machine analyses the reflected radiation to calculate the composition of the metal.

• Use: This method is fast and ideal for preliminary checks or items that cannot be damaged.

b. Cupellation (Fire Assay)

• What it is: A traditional and highly accurate method used primarily for testing gold.

• How it works: A small sample of the metal is melted at high temperatures with a lead-based flux. Non-precious metals oxidise and separate, leaving pure gold behind.

• Use: This method is considered the gold standard for accuracy in gold testing.

c. Titration

• What it is: A chemical process often used to test silver purity.

• How it works: The metal is dissolved in acid, and its purity is measured through a reaction with a standardised chemical solution.

• Use: This method provides highly accurate results for silver.

d. Density Testing

• What it is: A method based on the principle that different metals have unique densities.

• How it works: The item is weighed in air and water to calculate its density, which is then compared to known standards.

• Use: Commonly used for quick verification of items like gold bars or coins.

Does any of the jewellery you make contain nickel?

No, I only use sterling silver and solid gold and this does not contain any nickel. Additionally I do not make and sell gold plated, gold filled or rolled gold jewellery or any base metal jewellery (I can however gold plate on bespoke orders).

Is it illegal to sell earrings containing nickel?

In the UK, it is not outright illegal to sell earrings containing nickel, but there are strict regulations governing the amount of nickel that can be released from jewellery, including earrings. These regulations are designed to protect consumers from nickel allergies and skin irritation, which are common issues associated with prolonged exposure to the metal.

Why do precious metals need to be tested?

Testing precious metals in the UK is a meticulous process designed to ensure transparency, quality, and legal compliance. The hallmark on a piece of jewellery or a precious metal item provides a guarantee of its authenticity and fineness, offering buyers confidence in their purchase.