Compared to Cartier and some 'real' european brands, Tiffany is cheap.
A ball park - $10,000 in Tiffany = $15K in Cartier = $20K in Bulgari = $25K
Maybe slightly exaggerated, but that is the power of some of the European brands.
LMVH is about 50% bigger than De Beers, and imensly more profitable