Materials

All melee diamonds used in Clogau jewellery expertly cut in the classic Round Brilliant style and are a minimum G-H colour and SI1 clarity, ensuring a beautiful balance of sparkle, quality, and value. All diamonds are natural unless stated otherwise.

All diamonds that measure 0.30ct or above will have GIA certification.

All gemstones used in Clogau jewellery are natural, except for Cubic Zirconia where clearly stated. Natural gemstones may feature slight variations in colour, pattern, or texture, these are not flaws, but beautiful hallmarks of their organic origin.

Clogau gemstones are natural and hand-selected for their beauty and quality. Some may undergo traditional, industry-recognised treatments, such as heat treatment, to enhance their natural colour and clarity. These processes are standard practice in fine jewellery and do not diminish the gemstone’s authenticity or value.

Every piece of Clogau jewellery contains rare Welsh gold.

All Clogau sterling silver jewellery is finished with rhodium plating to enhance shine and provide a durable, tarnish-resistant surface.

Clogau pearl jewellery features cultured freshwater or saltwater pearls, responsibly sourced and selected for their natural lustre, elegance, and unique character. All pearls used in Clogau pieces are cultured, meaning they are formed naturally within molluscs under carefully controlled conditions. The majority of our designs feature freshwater cultured pearls, celebrated for their soft iridescence and graceful appearance.

Each pearl may display subtle variations in colour, size, or surface texture, these are not imperfections, but natural characteristics that enhance the individuality of every piece.

As a delicate organic gem, pearls should be worn and stored with care to preserve their natural beauty. We recommend avoiding contact with perfumes, cosmetics, and household chemicals, as these can cause discolouration or surface damage.

For best care, gently wipe pearls with a soft cloth after wear and store them in a soft-lined box or silk pouch, away from other jewellery, to prevent scratching, tarnishing, or loss of lustre.

All lab-grown diamonds used in Clogau jewellery are clearly identified as such. Our melee lab-grown diamonds are expertly cut in the classic Round Brilliant style and are a minimum G colour and SI1 clarity, ensuring outstanding sparkle and quality. Any lab-grown diamond measuring 0.30 carats or above is accompanied by a GIA certificate for added assurance of authenticity and grading accuracy.

Clogau confirms that all carat gold items we supply comply with the Dangerous Substances and Preparations (Nickel) (Safety) Regulations 2005, which set strict limits on nickel release to help prevent allergic reactions.

We remain committed to ensuring that all relevant products meet these safety standards, now and in the future.

Clogau is committed to the ethical sourcing of diamonds and adheres to the principles of the Kimberley Process Certification Scheme (KPCS) and the World Diamond Council’s System of Warranties (WDC SoW).

The KPCS, developed by governments, industry, and civil society, aims to prevent the trade in "conflict diamonds" and ensure that diamond purchases do not fund armed conflict.

Clogau requires written warranties from each of its diamond suppliers confirming that all diamonds supplied:
• Are in compliance with the KPCS.
• Have been purchased from legitimate sources not involved in funding conflict.
• Comply with applicable United Nations resolutions and corresponding national laws.

We include the following SoW declaration on all relevant invoices:

“The diamonds herein invoiced have been purchased from legitimate sources not involved in funding conflict and in compliance with United Nations Resolutions and corresponding national laws. The seller hereby guarantees that these diamonds are conflict free and confirms adherence to the WDC SoW Guidelines.”

For diamonds mined prior to 1 January 2003, Clogau warrants that we will not knowingly sell conflict diamonds and that, to the best of our ability, we undertake reasonable measures to help prevent their sale within our supply chain.

All jewellery and watch images shown online and in the Clogau brochure are for illustration purposes only and not shown to scale.

While we make every effort to ensure images are as accurate as possible, they may be subject to professional editing to enhance colour, detail, or clarity. As a result, slight variations in colour, gemstones, or fine detailing may occur when compared to the final product.

For full transparency, exact measurements and product specifications can be found on each item’s product page under the ‘Measurements’ tab.