Opal Necklaces – The October Birthstone, Hatton Garden Crafted

No two opals are alike — and that is precisely what makes an opal necklace one of the most individual and extraordinary pieces in fine jewellery. Opal’s unique play-of-colour, where flashes of red, green, blue, and gold shift and dance within the stone as it catches the light, creates a gemstone that is unlike any other. As the birthstone for October, an opal necklace carries a personal significance that makes it one of the most meaningful and memorable gemstone gifts you can give.

At FineDiam, our opal necklace collection celebrates this extraordinary gemstone, pairing its iridescent beauty with carefully selected diamond accents, all handcrafted in our Hatton Garden, London workshop by expert jewellers. Every piece is UK hallmarked by the London Assay Office and arrives in a luxury FineDiam gift box, beautifully presented and ready to wear. Explore our full range of opal bracelets to find a perfectly matched set.

Why Opal?

Opal is one of the most extraordinary gemstones in the natural world. Unlike any other stone, opal displays a phenomenon known as play-of-colour — an internal optical effect where flashes of spectral colour appear to move and shift within the stone as it catches the light. No two opals display the same pattern of colour, making every opal necklace a genuinely unique piece of jewellery.

The ancient Romans called opal the “queen of gems” because it contained the colours of all other gemstones within a single stone. Today, opal is the universally recognised birthstone for October, making an opal necklace one of the most personal and thoughtful gifts you can give to someone born in that month. White opal — the variety we use in our necklaces — has a pale, milky body colour that allows its play-of-colour to appear particularly vivid and luminous, and it pairs beautifully with white gold and platinum.

Our Opal Necklace Styles

Opal Solitaire Pendants

An opal solitaire pendant places a single, carefully selected opal at the centre of the design, allowing the stone’s extraordinary play-of-colour to speak for itself. Our solitaire pendants are available in oval and round white opal, set in four-prong or bezel settings in white gold, yellow gold, and platinum.

Opal & Diamond Halo Pendants

An opal centre stone surrounded by a halo of brilliant-cut diamonds creates one of the most ethereal and striking combinations in gemstone jewellery. The diamond halo frames and enhances the opal’s play-of-colour, creating a pendant that catches the light from every angle. Available in white gold and platinum.

Opal Drop Pendants

Our opal drop pendants allow the stone’s extraordinary play-of-colour to catch the light with every movement. These designs range from simple single-stone drops to more elaborate designs featuring diamond accents, and they make a stunning choice for October birthdays, anniversaries, and special occasions.

Opal & Diamond Necklaces

Opal and diamonds are a natural pairing in fine jewellery. Our opal and diamond necklaces are available in a range of styles and settings, with both natural and lab-grown diamond options available, all IGI and GIA certified.

Opal Necklaces as a Gift

An opal necklace is one of the most distinctive and memorable gifts you can give. As the October birthstone, it is a natural choice for October birthday gifts, and its unique play-of-colour ensures that no two opal necklaces are ever exactly alike. Every FineDiam opal necklace arrives in luxury gift-ready packaging with free UK delivery. Explore our full range of gemstone jewellery to find a perfectly matched piece.

Caring for Your Opal Necklace

Opal requires a little more care than harder gemstones, scoring 5.5 to 6.5 on the Mohs hardness scale. Remove your opal necklace during physical activity and any activity involving water or chemicals. Avoid extreme temperature changes, prolonged direct sunlight, and ultrasonic cleaners. Clean gently with a soft, damp cloth and store separately in a soft pouch.

Metal Options

Our opal necklaces are available in 9K yellow gold, 18K white gold, 18K yellow gold, 18K rose gold, and platinum. All metals are UK hallmarked by the London Assay Office. White gold and platinum are particularly popular with opal as they enhance the stone’s cool, iridescent play-of-colour.

Why Choose FineDiam?

At FineDiam, every opal necklace is handcrafted in Hatton Garden — London’s most prestigious jewellery quarter. We offer free UK delivery, a 60-day return policy, and a 6-month quality guarantee on every piece.

Find Your Perfect Opal Necklace Today

Whether you are searching for an October birthday gift, a truly individual anniversary present, or an extraordinary gemstone necklace for yourself, shop our opal necklaces today and find the piece that captures the unique, iridescent magic of the October birthstone.