ASA Jewellery has been crafting and selling fine diamond jewellery since 2000. We hold three boutiques across the UK — in Manchester, Chertsey and Staines — and offer both natural and lab grown diamonds across engagement rings, wedding rings, dress rings, earrings, bracelets and necklaces.

Yes. Our checkout runs on Shopify's secure, PCI-compliant payment system, and every page is served over an encrypted connection. Your card details are handled by the payment provider and are never stored on our site.

Yes. Our diamonds are independently graded by internationally recognised laboratories — GIA, the Gemological Institute of America; IGI, the International Gemological Institute; and HRD Antwerp. Each certificate records the stone's cut, colour, clarity and carat weight so you know exactly what you are buying.

The four characteristics used to grade every diamond: Cut, how well the facets return light; Colour, graded D to Z from colourless downward; Clarity, the natural inclusions within the stone; and Carat weight. Cut has the greatest influence on how much a diamond sparkles. Our diamond education pages walk through each one in detail.

Only their origin. Natural diamonds formed deep within the earth over billions of years, and each is a unique product of nature valued for its rarity. Lab grown diamonds are created in controlled laboratory conditions using advanced technology, which makes larger sizes more accessible within a given budget.

Yes. Our ring builder lets you choose a setting and pair it with the diamond you want, so you can see the design come together as you go. If you would rather talk it through, book an appointment and we will design it with you.

You will find us in three locations, open seven days a week, 10:00am to 6:00pm:

• Manchester — 28 London Road, SK9 7DZ
• Chertsey — 94 Guildford Street, KT16 9AD
• Staines — 52 High Street, TW18 4DY

You are always welcome to walk in. That said, an appointment means a consultant is set aside for you and the pieces you want to see are ready — worth booking if you are choosing an engagement ring or discussing a bespoke design.