DiamondBuzz
Lab grown Lonsdaleite: Chinese scientists create hexagonal diamond harder than natural diamonds

A groundbreaking discovery by Chinese scientists has led to the creation of an artificial diamond that surpasses natural diamonds in strength and heat resistance. Lonsdaleite is an allotrope of carbon that has a hexagonal crystal structure, rather than the cubic lattice of conventional diamond. It was first identified in 1967 from the Canyon Diablo meteorite, in Arizona, USA, regarded as one of the best-preserved meteorite craters on Earth. It was named after crystallographer Professor Dame Kathleen Lonsdale.
This new form, known as hexagonal diamond or lonsdaleite, has long been theorized to be harder than traditional diamonds but has remained difficult to synthesize in the lab. Recent advancements in material science have now made it possible, opening up exciting possibilities for industrial and commercial applications.
Scientists at Jilin University in China have successfully created an artificial diamond that surpasses natural ones in hardness and heat resistance. By heating compressed graphite under precise conditions, they have produced high-quality hexagonal diamonds, a structure known as lonsdaleite. This rare form, typically found in meteorite impact sites, has long been difficult to replicate in laboratories. The newly developed material exhibits remarkable structural integrity, promising advancements in various industries. A team from Jilin University and Sun Yat-sen University say their lab-grown version is at least 40 per cent harder and far more durable than a natural diamond.
“Our findings offer valuable insights regarding the graphite-to-diamond conversion under elevated pressure and temperature, providing opportunities for the fabrication and applications of this unique material,” they say in the journal Nature Materials.Their lab grown Lonsdaleite is likely to be used in a new generation of superconductors.

DiamondBuzz
Zen Diamond Unveils the Soirée Collection: Where Modern Gold Meets Italian Artistry

Zen Diamond, the internationally acclaimed fine jewellery brand, introduces The Soirée Collection — a bold and elegant line of contemporary gold jewellery that blends modern design with the finesse of Italian craftsmanship. Each piece in the collection is thoughtfully designed to elevate evening wear, offering a seamless balance of sophistication and standout style.
Crafted in polished gold and accentuated with exquisite detailing, The Soirée Collection brings together sculptural forms, refined silhouettes, and signature touches that celebrate quiet luxury. From intimate dinners to formal galas, the pieces are designed to make a lasting impression.
A standout piece is the coiled gold bracelet, gracefully encircling the wrist with fluid form and diamond-accented ends, shaped in marquise and round motifs. Inside, Zen’s hidden signature diamond adds a discreet mark of excellence.






The wind chime-inspired necklace features a cascade of layered gold bars anchored by a diamond-set central bar and a sapphire clasp, marrying movement and colour in harmonious rhythm.
Another highlight, a sculptural necklace with a twin-arc design, is crafted in warm gold and finished with a diamond-studded bar at the center, embodying strength and elegance.
Sculptural rings in the collection embrace open-ended forms — one featuring a diamond-set square and arrow motif for a bold contrast, while another showcases closely set pavé diamonds at either end, creating a radiant and modern silhouette.
Completing the collection are refined earrings shaped in an elongated marquise form, enhanced by a rhythmic pattern of alternating diamonds along the inner curve. An iris-inspired stud adds a poetic finish, reflecting Zen Diamond’s commitment to detail and artistry.
With The Soirée Collection, Zen Diamond redefines contemporary glamour — infusing timeless gold with modern edge and impeccable craftsmanship.
DiamondBuzz
AfDB approves $304 million loan to Botswana

The African Development Bank (AfDB) has approved a $304 million loan to support Botswana’s efforts to stabilise its public finances and implement key economic and governance reforms amid falling diamond revenues.
It marks a critical intervention in the country’s ongoing struggle with fiscal instability, primarily driven by a sharp decline in diamond revenues. This analysis examines the context, intent, and expected impact of the loan, as well as the broader economic challenges facing Botswana.
The loan aims to help Botswana navigate a widening fiscal deficit—expected to hit 6.7% of GDP this year—after the economy shrank by 1.7% in 2024, largely due to subdued global demand for diamonds, which account for around 80% of the country’s exports.
The $304 million loan is structured as a one-year general budget support operation for the 2025/26 fiscal year, under the Governance and Economic Resilience Support Programme (GERSP). The program is designed to address two main objectives:
Strengthening fiscal sustainability and transparency: Measures include boosting domestic revenue collection, curbing illicit financial flows, and enhancing the efficiency and accountability of public spending.
Stimulating inclusive economic growth: The program supports micro, small, and medium enterprises (MSMEs), with a particular focus on businesses owned by women and youth, to foster job creation and reduce inequality.
DiamondBuzz
Surat diamond manufacturers implement summer shutdowns on lower demand

Diamond manufacturers in Surat, India’s diamond polishing hub, have begun implementing summer shutdowns for the first time in years as demand for natural stones remains persistently weak and the threat of steep U.S. tariffs looms over the industry.
Traditionally, factories in Surat—home to nearly 4,000 diamond units—take their main annual break during Diwali, remaining operational through the summer months. However, the ongoing downturn has prompted many units to extend Diwali closures and introduce unpaid summer breaks, a move not seen in previous years.
Around 10% of Surat’s diamond factories have declared a summer holiday of at least 15 days, with some major units planning to stay shut until June 6, according to industry sources and local media reports. The closures have triggered an exodus of thousands of migrant workers, many of whom are returning to their hometowns in Saurashtra and North Gujarat as operations wind down.
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