Top 5 most expensive gemstones in the world

Women love to adorn themselves with jewellery. First, jewellery was made from bits of bone and shell; later, gems were set in copper, silver and gold. It takes many years for crystals to form in nature. Only a fraction of these is found and sold as gemstones. The price of the gemstones depends on several factors including setting and quality. Here are the most expensive gems in the world.

Red Diamond – $1,000,000/ carat


So far, only 30 diamonds have been found on earth. Most of these diamonds are less than half a carat. The red colour is derived from plastic deformation of the crystal lattice. The largest red diamond acquired was the famous 5.11ct Moussaieff Red Diamon found in 2011 for $8 million.

Taaffeite – $35,000/ carat


It was discovered first in Dublin, Ireland. The gemstone was mislabelled as spinel at that time. Later, it was found that the gem was a new stone. Double refraction is found in Taaffeite. It is found in the alluvial deposits within Tanzania and Sri Lanka.

Grandidierite – $20,000/ carat


This rare gem was first discovered in Madagascar in 1902. It is found as an accessory mineral rocks rich on aluminous boron. It has a semitransparent bluish green colour.

Serendibite – $18,000/ carat


It is a very rare gemstone. It was originally discovered in Sri Lanka in 1902. It has a complex chemical formula and includes calcium, aluminium, magnesium, boron, etc. This gem was recently discovered in Myanmar.

Diamond – $15,000/ carat


Diamond is the centrepiece of engagement rings. These are pure carbon that is arranged in a diamond lattice. It has huge strength and durability. These precious gems are found in cooled kimberlites that are formed over a period of 1 to 3 billion years.

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