Most buyers of aquamarine ask the same thing: has it been heated? In the trade the honest answer is usually yes. Aquamarine is routinely heated to turn greenish tones into a cleaner blue, and a careful buyer should always ask.

So ask us about this one. Write to WhatsApp +92 308 887 3888 with reference GS-000276 and we will tell you what we know, and independent lab testing is available on request. We would rather say "ask" than claim anything we cannot show.

What we do know

This is a natural aquamarine (beruj) of 13.25 carats, noted as sea blue, listed at Rs. 14,630, about Rs. 1,104 per carat. The Mohs hardness of 7.5 to 8 makes it suitable for rings as well as pendants, and a mid-sized stone like this is easy to set in silver. Use warm water and a soft brush to clean it.

When the parcel arrives you may open it and inspect the stone before paying on Cash on Delivery. More aquamarines are in the aquamarine collection.

Cash on Delivery is available across Pakistan, so you inspect the stone before paying, and returns are accepted within 7 days of delivery. 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 13.25 Carat. Its price is Rs. 14,630 — roughly Rs. 1,104 for each carat. Treatment: treatment not tested. Quote reference GS-000276 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.

Above twelve carats you are into collector territory. Pieces this heavy are usually set as pendants or kept loose, and they are prized for the size of rough they came from. If you do set it, choose a bezel or a heavy claw to protect the edges.

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.