A natural white topaz of 6.85 carats, about 7.53 ratti, at Rs. 13,700 – Rs. 2,000 per carat.

The truest oval of the thirteen

Almost every rounded stone gets called an oval, so it is worth earning. Measured properly – by comparing this stone's width at every row against the width a true ellipse of the same proportions would have there – this is the closest of the thirteen stones in this category to a real ellipse.

Its outline fills about 81% of its bounding box, where a perfect ellipse fills 78.5%, and it measures about 1.25 times as long as it is wide – the classic oval proportion. The practical value of that is money: a stone that is genuinely elliptical drops into a standard oval mount, while a lopsided one needs a seat cut specially for it.

Colour, measured

About 28% of this stone's face carries a faint yellow-green cast. That is middling for this parcel, where the cleanest reads under 9% and the most tinted nearly 39%. White topaz is the trade name for colourless topaz, but natural stones are rarely water-clear and we would rather give you the number than the adjective.

Hardness is not toughness

Topaz is 8 on the Mohs scale – harder than quartz, which is what ordinary airborne dust is made of, so it keeps its polish and its sharp facet edges through daily wear.

It also has perfect basal cleavage: a plane along which the crystal will split cleanly under a sharp knock. Scratch resistance and break resistance are different things, and topaz is excellent at the first and only fair at the second. Set it in a bezel or with covered claws, 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, which gets its colour from irradiation and heating as standard. That is a statement about the material and not a certificate for this piece: the treatment of this stone has not been tested and there is no laboratory report.

One of a consistent parcel

All thirteen white topaz in this category are priced at exactly Rs. 2,000 per carat, from 5.30 to 12.60 carats. You are choosing size and shape here, not grade.

Ordering

One stone, sold once. Quote GS-WT-0005 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 6.85 Carat. Its price is Rs. 13,700 — roughly Rs. 2,000 for each carat. Treatment: treatment not tested. Quote reference GS-WT-0005 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.