The name Beruj is old in the trade, and Pakistani jewellers have long used it for aquamarine, a beryl whose blue is said to recall sea water. As tradition goes, it was once carried by sailors; today most buyers simply choose it for its calm light blue colour.

The hard facts

This is a natural Afghan aquamarine of 2.5 carats, light blue, Mohs 7.5 to 8. It costs Rs. 2,480, about Rs. 992 per carat. Reference GS-000261.

That hardness makes it a sensible gem for a small ring, and it needs only an ordinary soft cloth to keep it clean. Because it is light in weight, a simple silver or gold setting is plenty.

Treatment is the usual conversation. Aquamarine is commonly heated to clear greenish tones and leave a cleaner blue. We will tell you what we know about this stone, and independent lab testing is available on request.

See more in the aquamarine category. Delivery is insured and tracked, with payment on delivery after inspection.

Pay Cash on Delivery once you have opened the parcel and seen the stone yourself, anywhere in Pakistan, with 7 days to return it if you change your mind. Before you choose, read our aquamarine guide.

This particular stone

This listing is one natural aquamarine, known in Urdu as Beruj, with a weight of 2.5 Carat. Its price is Rs. 2,480 — roughly Rs. 992 for each carat. Origin: Afghanistan. Treatment: treatment not tested. Quote reference GS-000261 when you message us about it. The photographs show this exact stone, so what arrives at your door is the piece you chose on screen.

Between two and six carats is the range most people choose for a gents' ring or a noticeable pendant. Here colour drives the price more than size does, which is why two stones of near-identical weight can be priced very differently.

On the Mohs scale aquamarine rates 7.5 to 8. It handles daily wear, but a hard knock can still nick an exposed corner, so a protective setting is a sensible choice. Clean it with warm soapy water and a soft brush, and keep it away from abrasive cleaners and high heat.

Whoever you buy aquamarine from, make sure of three things: the stone is natural rather than lab-grown, glass or glass-filled; any treatment is stated in writing; and the weight quoted is the weight of the finished stone. We check every aquamarine for those three points before it is listed, a certificate is available on request, and because you pay on delivery you can look at the stone — or have it tested — before any money changes hands.

We sell natural stones only and inspect each one before it is listed. Treatment for this stone: Treatment not tested. Certificate available on request. As general background (not a statement about this stone): Aquamarine is commonly heated to remove green tones and leave a purer blue. Ask us on WhatsApp and we will tell you what we know about this exact stone; independent lab testing is available on request.

A certificate of authenticity is available on request for this stone, and independent laboratory testing can be arranged. Because you pay on delivery, you can also take the stone to a lab of your choice within the 7-day return window. Read more on our authenticity page.