The word "natural" does more work than it should in gemstone listings, and blue topaz is the clearest case of it. This page sets out exactly what is natural about this stone and what is not, because the honest answer is more useful than the flattering one.

The stone

10.90 carats, which is 11.98 ratti. Rs. 21,800, Rs. 2,000 per carat, reference GS-BT-0007.

What is natural here, and what is not

• Natural: the topaz itself. A mined aluminium silicate crystal, cut and polished. Not glass, not synthetic spinel, not a doublet, not lab-grown.
• Not natural: the blue. It comes from irradiation followed by heating, applied to colourless topaz — which is abundant and cheap.
• Standard, not a secret: this is how effectively all blue topaz on the market is made, everywhere in the world, and our specification sheet says so on every listing.
• Permanent: the colour does not fade, wash out or rub off with ordinary wear.
• Safe: treated material is held until residual activity has decayed to safe levels before it is released for sale, which is a regulated requirement rather than a courtesy.

Naturally blue topaz does occur. It is rare, it is very pale, and it does not come to market at Rs. 2,000 a carat. If a seller tells you otherwise without qualification, that tells you something about the seller.

Does the treatment reduce the value?

Not within this market, because the whole blue topaz trade is built on treated material — you are comparing like with like, and the price reflects it. What would reduce the value is being sold glass or synthetic spinel as topaz, which does happen. The checks are simple: topaz is noticeably heavy for its size, glass shows round bubbles and swirl lines under a loupe, and topaz at 8 on the Mohs scale does not accumulate the fine surface scratches an old glass imitation always carries. Our real versus fake gemstones guide goes through it.

What to judge instead

Since colour is consistent across the market, workmanship is where stones actually differ. Look for a bright face with no window — hold it over printed text and you should not be able to read through the middle. Check facet junctions for crisp meeting points, and the girdle for chips and even thickness.

Durability

Topaz is 8 on the Mohs scale, harder than quartz or agate. But it has perfect basal cleavage, which means a sharp knock in the wrong direction can split it cleanly — hardness and toughness are different properties. Never use an ultrasonic or steam cleaner; warm soapy water and a soft brush are all it needs. Our topaz care guide has the full routine.

Verification

A certificate of authenticity is available on request and independent laboratory testing can be arranged — a report will confirm the species and that the colour is treated. You pay the rider only after the parcel is open, and the seven-day return window runs from delivery.

Ordering

One piece only. Shape and measurements have not been recorded; ask on WhatsApp at +92 308 887 3888 and we will measure it. Flat Rs. 500 delivery anywhere in Pakistan, insured and tracked, dispatched in one to two working days. More in the blue topaz collection.

This particular stone

This listing is one natural blue topaz with a weight of 10.9 Carat. Its price is Rs. 21,800 — roughly Rs. 2,000 for each carat. Treatment: irradiated & heated. Quote reference GS-BT-0007 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.

From six carats up a stone becomes the centre of attention. It wants a broader shank or a secure claw setting and suits an occasion ring, a signet or a centre pendant. Clean natural material of this size turns up far less often, and the per-carat rate reflects that.

On the Mohs scale blue 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 blue 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 blue topaz 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: Irradiated & heated. Certificate available on request. As general background (not a statement about this stone): Blue topaz gets its blue colour from irradiation and heating — this is standard for the stone and the colour is stable. 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.