How much you spend on a diamond depends on how rare the diamond is. The question is – which diamonds are the most expensive to buy?
Elaborate coloured diamonds are the most expensive to buy and account for a mere 0,1% of all diamonds mined globally, which makes them extremely rare and all-in-all very expensive. There are very few mines that actually produce these coloured stones and in some instances, certain colours are so unusual that they are sold long before they get to the processing stage.
By rule of thumb, the deeper the colour of the diamond, the more expensive the stone.
Pink, blue, green, purple and orange diamonds fetch higher prices as they are rare, but price will usually depend on the depth of colour of the stones and the carats – blue and pink being the most sought-after colours, particularly on auction.
Yellow and champagne-coloured diamonds get their colours by nitrogen; blue diamonds, however, get their colours by boron. Red and pink diamonds are not coloured by impurities – instead, their colour is the result of minuscule defects in the crystal lattice.
Red diamonds are the rarest stones of all and a