Discover the rich history and radiant beauty of November’s birthstones—citrine and topaz—in this guide by SICO International.

In the world of fine jewellery and investment gems, the trend is clear: rare coloured gemstones are becoming more than accessories, they’re tangible assets, artistic statements and symbols of timeless elegance. At SICO International Ltd (London), we’ve witnessed first hand how demand for exquisite rubies and sapphires is surging globally. This blog post will explore the forces shaping this trend, dive into what distinguishes top-quality coloured gemstones.

Discover five of the rarest gemstones prized by collectors and investors alike for long-term value.

Explore the exquisite gemstones and craftsmanship in Victoria Beckham’s iconic ring collection.

October is blessed with two dazzling birthstones: opal and tourmaline. Each gem offers its own unique palette and symbolic power, making this month one of the most colourful on the calendar.

At a royal farewell, the Princess of Wales subtly honored her family and recovery journey with a powerful five-ring stack.

Gemstone dealers enter 2025 with confidence as demand for rare and vibrant coloured stones continues to rise. Here’s what’s driving growth—and what buyers are loving now.

From ancient kings to modern collectors, sapphire has long captured imaginations. As the birthstone of September, it brings both brilliance and symbolism.

Gemfields has introduced Imboo, a colossal 11,685-carat emerald discovered at the Kagem Mine in Zambia—now one of the largest rough emeralds ever revealed.

Lady Gaga’s Malibu coffee run with fiancé Michael Polansky revealed more than caffeine cravings—her dazzling new engagement ring is setting the internet ablaze.

Cristiano Ronaldo’s proposal to Georgina Rodriguez was as grand as you’d expect—featuring a jaw-dropping 30-carat engagement ring that’s now the talk of the jewellery world.

August babies are lucky to have not just one, but three stunning birthstones: peridot, spinel, and sardonyx. Each gem brings its own color, history, and energy—making August one of the most dynamic months in the birthstone calendar.

Charli XCX’s wedding ring stack blends classic elegance with modern flair. Discover how her traditional solitaire and chunky band reflect a growing bridal trend that values personal expression over convention.

At Wimbledon, the Princess of Wales debuted a stunning stacked ring look, pairing her iconic sapphire engagement ring with two elegant eternity bands. The style reflects a growing jewellery trend—ring stacking with personal meaning.

Rubies, the birthstone for July, symbolise passion, protection, and vitality. Known for their rich red hue and timeless appeal, rubies have been treasured for centuries as stones of power and love. In this blog, we explore the captivating history, symbolism, and qualities of this fiery gem, and why it’s a perfect choice for July birthdays or any meaningful occasion. Discover what makes rubies one of the most coveted gemstones on earth.

British pop icon Dua Lipa has officially confirmed her engagement to Callum Turner, revealing a bold and bespoke 2-carat diamond ring that’s redefining modern bridal jewellery. Here’s the story behind her one-of-a-kind piece.

Explore the beauty and meaning of June's birthstone, alexandrite and pearl—symbols of love, luck, and transformation.

When it comes to rare and precious gemstones, sapphires have long captivated royalty, collectors, and connoisseurs alike. At Sico International, based in London’s prestigious Hatton Garden, sapphires are not just a speciality — they’re a passion. With over 26 years of global experience, and sourcing offices in Colombo, Sri Lanka, and Chantaburi, Thailand, we offer clients access to some of the rarest and most valuable natural sapphires in the world.

SICO International, nestled in the heart of London's renowned Hatton Garden, stands as a beacon for connoisseurs and collectors seeking the world's most exquisite gemstones. With over 26 years of experience, this family-run enterprise has cultivated a reputation for sourcing and supplying rare, certified gemstones that epitomise luxury and authenticity.

The demand for rare colored gemstones – especially rubies and sapphires – is surging in 2025. Global market research predicts the colored gemstone sector will more than double by 2035, growing from about $1.9 billion today to $5.7 billion.