Diamonds have been in demand since historical times

Jewellery made from rare gemstones has been in fashion for centuries, where the shine and sheen of such stones can turn on the brain and reignite the ancient search for water, as per the study by Belgian researchers. 

The brain, as it gazes at the gems, tries to search for perfection and security; at the same time, as these stones are inspirational fashion accessories showcased by celebrities at various film festivals, they can be reset and redesigned after many years to create a new piece of ornaments. 

In the 19th century, the financial centres in London and New York were excited about the discovery of diamonds in the mountains of Colorado. 

The country’s surveyors were amazed to see such a mountain and noticed that the stones were already cut as they surveyed it. The mountain contained low-grade stones, which were cut by some professional gem cutters. 

Investment-grade Gemstones 

Some coloured gemstones, like rubies, are considered safest in terms of investment, which hold higher values and always get buyers, more than ever, if rare. 

Some of the finest unheated stones can gain an estimated value of over $1 million a carat at auctions. 

Such high-value stones are extracted from Madagascar, Tanzania, and Mozambique mines and can quickly deliver higher returns than other coloured gemstones. 

The top three include the emeralds, initially considered large-sized green stones from Brazil and Colombia. Several investors trust the dealers to buy it. Still, the investment can be made carefully in the ones that have not been treated to enhance clarity levels, as they can gain higher values at auctions of almost more than $300,000 a carat. 

Investment-grade diamonds include coloured gemstones celebrities wear and can be seen in high-profile engagement rings. Red is also valued like yellows and pinks, while a vivid yellow can gain around $100,000 a carat. 

Similarly, white or blue sapphires with deeper tones and darker shades can get more value than other sapphires. These are a good investment and can gain in the range from $100,000 to $50,000 a carat. 

The new buyers are attracted to modern stones that suit their style, like the Tanzanite, which gets several buyers in China and Asia and can be bought for $ 5,000 a carat. 

Many of these stones are rarer than diamonds, like the Paraiba tourmaline, which can be found only in the remote mines of Brazil and its blue-green variety is priced double the price of pure blue ones. 

One can also get green colours in Paraiba Tourmaline. Similarly, Alexandrite is famous for its colour-changing property and is one of the rarest where the resource of the gemstones has almost depleted. 

It can cost in the range of $100,000 a carat. Spinels are red, like rubies or pink, or can be colourless. These are considered a great investment where the price can go up to $50,000 a carat.