With topaz, care comes first. This 5.45 carat yellow stone measures 8 on the Mohs scale, which is tough, but it also has a perfect cleavage plane, so a sharp blow can split it even though scratching is unlikely. Choose a setting that shields the edges, take the ring off for the gym and gardening, and keep it off stone floors.

For cleaning, lukewarm water, a little mild soap and a soft brush are enough. Dry it with a cloth and keep it in a pouch of its own.

The stone itself is a natural yellow topaz, known in Pakistan as pukhraj or sunehla, and listed from Katlang. Heat is used on some topaz colours, but golden stones are mostly left as found.

To hear what we know about this piece, message us on WhatsApp quoting AG-000490. You can also read our topaz care advice or browse the topaz collection.

Pay the rider only after you have opened the parcel and checked the stone. We deliver across Karachi in 1–2 working days and to other cities in 2–4, and unused stones can be returned within 7 days.

This particular stone

This listing is one natural topaz, known in Urdu as Sunehla, with a weight of 5.45 Carat. Its price is Rs. 15,000 — roughly Rs. 2,752 for each carat. Treatment: treatment not tested. Quote reference AG-000490 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 topaz rates 8. 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 topaz 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 topaz 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): Yellow and golden topaz is usually untreated, though some colours are produced by heating. 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.