Esquire: How To Get Your Own Troublesome, $1.1m Uncut Gem, The Black Opal

What Hatton Garden lacks in glamour, however, it makes up for with an archive of knowledge that dates back to the 1870s – and Holts is one of its oldest shops. The space is light, spacious, and welcoming; a counter to its neighbours, who hide behind walls of bulletproof glass. Nor is the counter thronged with loved-up couples hemming and hawing over engagement rings. There's no muzak. Holts is a place where insiders rub shoulders and outsiders come for something bespoke, something 'extra special'...

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