The Montblanc Bohème actually exists with a black stone on the clip; this is even one of the most-sold variants of the series, which formerly bore the name Rouge & Noir. The trim consists, however, not of white gold but is platinum-plated; a gilding with white gold Montblanc has never offered on the Bohème. The pieces described in the offer are most likely genuine; only the seller's material description is misleading. For a final judgement, meaningful photos are helpful.