At 13.05 carats and Rs. 15,380, this natural neelam works out at about Rs. 1,179 per carat. In sapphire that is a modest rate, and it is worth understanding why: larger stones usually cost less per carat than small ones, and the final figure depends heavily on colour depth and clarity rather than on weight alone.

The stone is blue, weighs a little over thirteen carats, and has a Mohs hardness of 9. We list it under reference GS-000806. Colour and clarity are the two things to judge when it reaches you; hold it near a window, tilt it slowly and see how the blue behaves.

Setting advice

A stone of this weight sits happily in a gents ring or a statement pendant. A bezel-style mount adds protection, while claws show more of the stone. Silver is the usual starting point, and gold can follow if you want something longer-lasting; we can talk through a custom silver ring on WhatsApp.

Sapphire is often heated, so ask us what we know about this one. Meanwhile, the sapphire collection helps you compare stones.

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 sapphire guide.

This particular stone

This listing is one natural sapphire, known in Urdu as Neelam, with a weight of 13.05 Carat. Its price is Rs. 15,380 — roughly Rs. 1,179 for each carat. Treatment: treatment not tested. Quote reference GS-000806 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 sapphire rates 9. Few materials will scratch it, so it copes well with everyday ring wear. A soak in warm water with a drop of mild soap and a soft brush keeps it bright; skip the ultrasonic cleaner if inclusions reach the surface.

Whoever you buy sapphire 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 sapphire 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): Most sapphire on the market is heated to improve colour and clarity; unheated stones exist and cost more. 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.