A heavy silver bezel or a closed-back ring setting is where this 15.35 carat black and blue neelam looks right. Silver suits the darker tones and keeps the stone safe. Gold works too if the budget allows, and either metal looks good against it.

As a pendant, the size is easy to carry because a chain spreads the weight. As a ring, think of a broad band so the stone sits low and does not catch on sleeves. We can talk through a custom silver ring setting on WhatsApp.

The facts

This natural sapphire weighs 15.35 carats and shows black and blue colouring, with a hardness of 9 on the Mohs scale. Its rate per carat is low for its size. Quote AG-000770 so we pull up the right stone.

Look at it by a window and then under a lamp; stones like this read darker indoors and bluer in daylight.

Treatment: sapphire is very often heated for colour, so ask what we know about this one. Independent lab testing is your choice to arrange.

Neelam is tied to Saturn in Vedic tradition, and an astrologer's advice is customary before wearing it.

Compare similar pieces in our neelam stones, and read the sapphire buying guide for general tips.

Open the parcel at your door and pay only if you are happy. Karachi typically 1–2 working days, the rest of Pakistan 2–4, with a 7-day return window.

This particular stone

This listing is one natural sapphire, known in Urdu as Neelam, with a weight of 15.35 Carat. Its price is Rs. 22,500 — roughly Rs. 1,466 for each carat. Treatment: treatment not tested. Quote reference AG-000770 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, 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. No lab report yet; independent testing welcome. 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.