Glenn Spiro, the gem maverick of Mayfair

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Roula Khalaf, Editor of the FT, selects her favourite stories in this weekly newsletter.

The jewels of Glenn Spiro are unlike those found in the collections of more traditional maisons. Laid out on a desk in the brand’s London headquarters – the former Mayfair studio of royal couturier Norman Hartnell – is a pair of dangly earrings, designed to look like fish skeletons, with bones so fine they could pick a tooth; a Bullet ring with an enormous,…