As everybody knows, some diamonds are more valuable than the others. Mostly all diamond increase in price with inflation, that means that the diamond bought in 1970 will cost significantly more today. However, there are diamonds that show fantastic growth, which can be compared with cryptocurrency "tothemoon".
Speaking of colorless diamonds, the price mainly depends on how perfectly the diamond is cut. Clarity, carats and limited supply of such stones also play the role, allowing such diamonds to increase in value more rapidly. But there's lot more factors come in play, when we consider fancy diamonds.
As said by Alrosa, "colored diamonds appreciate even in turbulent times against the backdrop of instability of the world economy". Some colors are more rare and their value increases faster. For example, yellow diamonds had rose by 1.6% in the third quarter of 2018. Though, the most rare natural diamond color is red, that doesn't mean it gains in value more than others.
Today pink diamonds are one of the best options for investments, because The Argyle Diamond Mine in Australia, a source of over 90% of pink diamonds in the world is set to close by 2020. Due to this, some pink diamonds already set record prices. For example, The Pink Legacy, a 18.96-carat vivid pink diamond was sold at Christie’s Geneva for $50.4 million, or The Pink Star, a 59.60-carat fancy vivid pink diamond was sold for $71.2 million at a Sotheby's.
And this may be only the beginning. By opening inclosed market to the wide audience, Diamond Open Market attracts many undervalued diamond of individual owners. The rivalry among the buyers will make their prices rise and who knows which diamond will exceed estimated price next year.