Cullinan VII is an 8.8-carat marquise-cut diamond, the seventh-largest of the nine principal stones fashioned from the celebrated Cullinan rough in 1908. Polished by Joseph Asscher & Co. of Amsterdam, it is a Type IIa diamond — a classification denoting the near-total absence of nitrogen impurities and, consequently, a colourlessness and transparency of the very highest order. The stone is today mounted as the central pendant of the Delhi Durbar necklace, a Mughal-inspired jewel created in 1911 for Queen Mary and held in the British Royal Collection. Among the nine Cullinan principal stones, it occupies a singular place: not set in a crown or sceptre, but suspended at the throat of one of the most historically charged pieces of jewellery ever commissioned by the British monarchy.

The Cullinan Rough and Its Division

The Cullinan diamond was unearthed on 26 January 1905 at the Premier Mine in the Transvaal, South Africa, by superintendent Frederick Wells. At 3,106.75 carats in the rough, it remains the largest gem-quality rough diamond ever found. The Transvaal government purchased the stone and presented it to King Edward VII as a birthday gift in 1907. The task of cleaving and polishing it was entrusted to Joseph Asscher & Co., then the foremost diamond-cutting house in the world, based in Amsterdam.

The division of the Cullinan was a feat of extraordinary technical precision. After months of study, Joseph Asscher cleaved the rough in early 1908, ultimately yielding nine principal stones — designated Cullinan I through Cullinan IX — along with ninety-six smaller brilliants and a quantity of polished fragments. The principal stones ranged from the 530.20-carat Cullinan I (the Great Star of Africa) down to the 4.39-carat Cullinan IX. Cullinan VII, at 8.8 carats, sits seventh in this hierarchy by weight, though its marquise form and exceptional optical character give it a presence disproportionate to its carat size.

Gemological Character

As a Type IIa diamond, Cullinan VII belongs to the rarest broad category in the diamond classification system. Type IIa stones contain no measurable nitrogen in their crystal lattice, which in practice means they absorb no light in the near-ultraviolet range and transmit with exceptional efficiency across the visible spectrum. The result is a stone of extraordinary colourlessness and brilliance. Gemologists at the Gemological Institute of America have long noted that the finest Type IIa diamonds — of which the Cullinan stones are perhaps the most celebrated examples — frequently display what is described as a "pure" or "icy" white that distinguishes them from the merely colourless.

The marquise cut — an elongated elliptical brilliant with pointed ends — was a fashionable form in the Edwardian period, prized for its ability to maximise apparent size and to flatter the hand or décolletage when worn as a pendant or ring. For a stone of 8.8 carats, the marquise outline creates a face-up surface area considerably larger than a round brilliant of equivalent weight, making Cullinan VII visually commanding despite its relatively modest carat value within the Cullinan family.

No independent laboratory report for Cullinan VII has been published in the open literature, as the stone remains in the Royal Collection and has not been submitted for commercial grading. Its clarity is described in authoritative accounts as exceptional — consistent with the broader character of the Cullinan principal stones, several of which have been assessed informally as internally flawless or very nearly so.

Presentation and Early History

The nine principal Cullinan stones were retained by the Asscher firm following polishing and were subsequently purchased by the Transvaal government, which had already gifted the rough to the Crown. The stones were delivered to King Edward VII in 1908. Cullinan I and Cullinan II were set into the Crown Jewels — the Sovereign's Sceptre with Cross and the Imperial State Crown respectively — almost immediately. The remaining seven principal stones were retained by the Royal Family and distributed or set over the following years.

Cullinan VII was presented to Queen Mary in 1910, the year of King George V's accession. Queen Mary, born Princess Victoria Mary of Teck, was a passionate and knowledgeable collector of jewellery and objets d'art, and her acquisition of several Cullinan stones — including Cullinan III, IV, V, VI, VII, and VIII — reflected both her personal taste and her determination to build a jewellery collection worthy of the British Crown. Cullinan VII was specifically destined for the necklace that would become one of the defining jewels of her reign.

The Delhi Durbar Necklace

The Delhi Durbar necklace was created in 1911 for the Delhi Durbar of December that year — the great imperial assembly held at Delhi to mark the coronation of King George V and Queen Mary as Emperor and Empress of India. It was one of the most significant ceremonial events of the British imperial era, attended by hundreds of Indian princes and dignitaries, and the jewellery worn by Queen Mary was conceived as a deliberate statement of imperial splendour calibrated to the Mughal aesthetic traditions of the subcontinent.

The necklace is composed of diamonds and emeralds in a design that draws consciously on Mughal jewellery conventions: the use of large, flat-cut or cabochon emeralds alongside brilliant-cut diamonds, the articulated pendant drops, and the overall emphasis on richness of colour and surface rather than the more restrained European parure tradition. The emeralds in the necklace are of significant size and quality, their deep green providing a chromatic counterpoint to the colourless brilliance of the diamonds throughout the piece.

Cullinan VII is set as the principal pendant of the necklace, suspended below the main body of the jewel in its marquise form. In this position it functions as the visual terminus and focal point of the entire composition — the element to which the eye is drawn last and which anchors the piece both physically and aesthetically. The choice of a marquise cut for this pendant role was apt: the elongated form reads clearly at a distance and catches light along its length in a manner that a round brilliant of equivalent weight would not.

The necklace was made by the London jewellers Garrard & Co., who held the appointment of Crown Jeweller at the time and were responsible for a number of the major jewellery commissions associated with the 1911 Durbar. The overall design reflects the broader Edwardian and early Georgian fashion for "Indian" or "Oriental" motifs in high jewellery, a taste that had been cultivated in British aristocratic circles since at least the mid-nineteenth century and that found its most elaborate royal expression in the Durbar commissions.

Queen Mary and the Cullinan Stones

Queen Mary's relationship with the Cullinan stones is one of the more remarkable chapters in the history of royal jewellery. She wore several of the principal stones in different configurations throughout her life, and the stones she held passed to Queen Elizabeth II upon her death in 1953. Queen Elizabeth II wore the Delhi Durbar necklace on a number of documented occasions, and the jewel has been exhibited publicly as part of presentations of the Royal Collection.

The concentration of Cullinan principal stones in Queen Mary's personal collection — as distinct from the Crown Jewels held in trust — reflects the somewhat unusual disposition of the original gift. Because the Transvaal government had gifted the rough to King Edward VII personally rather than to the Crown as an institution, the stones that were not immediately set into the regalia were treated as personal property of the sovereign and could be passed down within the family rather than remaining as inalienable Crown property. This distinction has had lasting consequences for how the stones are held and displayed.

The Delhi Durbar in Context

The 1911 Delhi Durbar was the third and last of the great imperial durbars held by the British in India, following those of 1877 and 1903. It was the only one attended in person by the reigning monarch. The jewellery worn by Queen Mary at the Durbar — including the necklace bearing Cullinan VII — was documented in contemporary photographs and newsreel footage, making it among the earliest major royal jewellery to be recorded on film. The images of Queen Mary in full Durbar regalia, with the Delhi Durbar necklace at her throat, became iconic representations of the Edwardian imperial moment.

The Mughal-inspired aesthetic of the necklace was not merely decorative. It carried a political dimension: the use of design vocabularies associated with the Mughal emperors — who had themselves been among the greatest collectors of diamonds and emeralds in history — was a deliberate signal of continuity and legitimacy addressed to Indian audiences. The Mughal court had been the destination of many of the world's most celebrated diamonds before the colonial period, and the appearance of a necklace in that tradition, set with stones from South African mines that had enriched the British Empire, carried a complex symbolic charge that contemporaries would have read clearly.

Current Status and the Royal Collection

The Delhi Durbar necklace, with Cullinan VII as its pendant, is held in the British Royal Collection and is not on permanent public display. It has been exhibited on selected occasions and is documented in the Royal Collection Trust's published catalogues. The necklace passed from Queen Mary to Queen Elizabeth II and is now held by King Charles III as part of the broader Royal Collection.

Unlike Cullinan I and Cullinan II, which are set into items of regalia displayed in the Jewel House at the Tower of London, the Delhi Durbar necklace and its Cullinan VII pendant are personal jewellery rather than Crown Jewels in the strict constitutional sense. They are therefore not on continuous public view, though they have appeared in major exhibitions of the Royal Collection in recent decades.

Within the hierarchy of the nine principal Cullinan stones, Cullinan VII is among the less frequently discussed, overshadowed by the sheer scale of Cullinan I and II and by the sentimental associations of Cullinan III and IV (the "Lesser Stars of Africa," which Queen Mary wore as a brooch and which Queen Elizabeth II wore frequently). Yet in its setting — suspended at the centre of one of the most historically significant pieces of jewellery in the Royal Collection, in a form that maximises its optical impact — Cullinan VII is arguably displayed to greater individual effect than several of its larger siblings.

Further Reading

• GIA — Famous Diamonds: The Cullinan
• Royal Collection Trust — The Queen's Jewels