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For coloured gemstones, carat, colour and origin greatly affect their value. These and other details like their photograph and treatment need to be written on the gemstone's certificate. Without the cert, you won't know if you're truly getting the gemstone you paid for.

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Natural gemstone jewellery is made from precious or semi-precious stones, such as rubies, sapphires, emeralds, and others, that are cut and polished for use in jewelry making.

Unlike diamond 4Cs, there is no universal grading system for coloured gemstones at the moment. At ZCOVA, we use ICL’s grading system to determine a gemstone’s colour intensity, clarity and cut consistently.

When buying natural gemstone jewellery, the gemstone should reflect your personality and taste. Discuss with our ZCOVA Curators regarding the colour, clarity or any visible inclusions and how it affects its value. Choosing the perfect gemstone is very subjective.

Different gems require different cleaning techniques. Ask what cleaners can be used on your choice of gemstone jewellery.

Yes, in fact, most retailers out there buy gemstones online. With the latest technology, we can view gemstones in a 10x magnified, 360-degree view allowing you to see through every detail of the gemstone. Much better than what our naked eyes can do.

Moreover, ZCOVA provides ICL certified gemstones to guarantee you the origin, carat and colour of your gemstone jewellery for your peace of mind.

The five most popular gemstones that are used in jewellery are emeralds, rubies, sapphires, amethysts and aquamarine.