London Jewelers is rocking its 100th anniversary in a big way. The renowned luxury retailer is celebrating its centennial by transforming a massive 63-carat natural rough diamond into a 20.26-carat D-color, flawless, old mine cushion-cut sparkler.  The final weight was chosen to match the current year, a nod to the company’s major milestone. The precious stone will be shaped in Botswana, its homeland, by Grandview Klein Diamonds as part of the Origin De Beers Group program. The innovative