A natural white topaz of 8.70 carats, about 9.56 ratti, at Rs. 17,400 – Rs. 2,000 per carat.

The only round stone in this category

Measured, this stone is about 1.06 times as long as it is wide – the only round one of the thirteen here, where every other stone runs from 1.12 to 1.39 and reads clearly as an oval or a rectangle.

Being straight about it: 1.06 is a hand-cut round, not a machine-perfect circle, and if you put a pair of calipers across it you will find one direction a few per cent longer than the other. On the hand nobody will see it. But it is a round in the way a cutter working by hand makes a round, and it is worth saying so rather than implying a precision that is not there.

A round is the easiest shape to set and the easiest to replace a mount for, and it suits a solitaire ring or a stud better than any oval does.

The most tinted stone here, measured

About 39% of this stone's face carries a visible yellow-green cast – the most of the thirteen stones in this category, where the cleanest reads under 9%.

That is a real difference and you should know it before you order. In the hand it is a warm, slightly champagne-leaning white rather than an icy one. Against yellow gold that reads as deliberate and rather good; against silver it looks softer than a clean stone would. If the colourless look is what you are after, this is the wrong stone in this parcel and we will happily point you at the right one.

Hardness, cleavage and care

Topaz is 8 on the Mohs scale, harder than the quartz in ordinary dust, so it keeps its polish and its facet edges through daily wear.

It also has perfect basal cleavage, a plane along which it will split under a sharp knock. Hardness resists scratches and does nothing about breaking. In a solitaire especially, ask for a bezel or claws that cover the girdle, take it off for heavy work, and keep it away from ultrasonic cleaners and sudden heat. Warm water, mild soap and a soft brush.

Treatment

Colourless topaz is usually untreated, unlike blue topaz, whose colour comes from irradiation and heating as standard. That is the material rather than this piece: the treatment of this stone has not been tested and there is no laboratory report.

Ordering

One stone, sold once. Quote GS-WT-0009 when you message us. Message us on WhatsApp for more photographs or a video, and we deliver across Pakistan.

This particular stone

This listing is one natural white topaz with a weight of 8.7 Carat. Its price is Rs. 17,400 — roughly Rs. 2,000 for each carat. Treatment: treatment not tested. Quote reference GS-WT-0009 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 white 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 white 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 white 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: Treatment not tested. Certificate available on request. As general background (not a statement about this stone): Colourless (white) topaz is normally untreated. 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.