David Benderly: PermaScribe seeks to put trust mark on diamond table, not just girdle

In this interview with Rough & Polished’s Mathew Nyaungwa, PhotoScribe Technologies president and chief executive David Benderly explains how PermaScribe differs technically from conventional laser inscription, its potential to strengthen security, and...

31 august 2026

The great reset: Paul Zimnisky on supply catharsis, De Beers' bargain and the case for natural diamonds

The natural diamond industry is in the throes of its most profound reset in a generation. Supply is plunging to its lowest level since 1987 and De Beers—once valued at over $9 billion—is reportedly being sold for as little as $1 billion.
Lab-grown...

10 august 2026

Roman Karakurkchi: Maintaining the highest standards of jewelry craftsmanship

Roman Karakurkchi is the founder of the Roman Karakurkchi jewelry brand and the International Jewellery School that brings together instructors from Russia, the USA, the Netherlands, Spain, Belgium, Italy, and Germany, as well as students from 65 countries...

03 august 2026

Mehul Shah pledges to bring new approach to leading WFDB

Mehul N. Shah, who was elected in July as President of the World Federation of Diamond Bourses at the 41st World Diamond Congress in Singapore, is one of India's best-known diamantaires and a prominent leader in the international diamond industry...

27 july 2026

Charlotte Rose on making history, modernising the London Diamond Bourse, and why finance is the industry’s silent crisis

When Charlotte Rose was elected president of the London Diamond Bourse in June 2026, she didn't just break an 86-year tradition—she became the first woman to lead any diamond bourse globally. In an exclusive interview with Rough & Polished’s Mathew...

20 july 2026

Foundation stone laid for $21.4 billion green hydrogen hub in India

17 january 2025

Indian Prime Minister Narendra Modi has launched a green hydrogen hub project in Visakhapatnam in Andhra Pradesh.

NTPC Green Energy Limited’s Green Hydrogen Hub project at Pudimadak near Visakhapatnam is expected to attract an investment of Rs 1.85 trillion ($21.4 billion). It is noted that the hub will be the first green hydrogen hub under the National Green Hydrogen Mission. The New and Renewable Energy Development Corporation of Andhra Pradesh (NREDCAP) is a 50:50 partner with NTPC Green Energy Limited (NGEL) of the Union government in this project.

The phased investment plan envisages the first one-third of the investment of Rs 62,900 crore ($7.2 billion) in 2027. The project includes 20 gigawatts of renewable energy capacity and green hydrogen production capacity capable of producing 1,500 tonnes per day (TPD) of green hydrogen and 7,500 TPD of green hydrogen derivatives, including green methanol, green urea and sustainable aviation fuel, with a focus on export markets.

Andhra Pradesh's economy is set to reach $2.5 trillion by 2047.

Hélène Tarin, Editor-in-Chief of the Asian Bureau, Rough&Polished