A natural tanzanite of 6.30 carats, about 6.92 ratti, at Rs. 47,250 – roughly Rs. 7,500 per carat. Its colour is recorded as Blue.

What "premium" means here, and what we cannot show you

This is the most expensive single stone in this category by a wide margin, so it gets the plainest write-up on the site.

What is certain. It is the largest of the nine at 6.30 carats, where the smallest is 2.18, and the dearest in total at Rs. 47,250. Large tanzanite is genuinely scarcer than small, and the rate per carat rises with size in this material rather than falling, so some premium over the smaller stones is expected and normal.

What we cannot stand behind. Its rate of Rs. 7,500 per carat is 55% above the next dearest stone here, at Rs. 4,854, and nearly four times the cheapest, at Rs. 1,909. A gap that size in tanzanite normally means a much finer colour – and we have no way to show you that, because the photograph on this listing is a catalogue image shared across all nine tanzanite listings on this site, not a photograph of this stone. We compared the nine image files; they are one photograph, several mirrored.

So before you spend this much: message us on WhatsApp and ask for photographs and a video of the actual stone, in daylight. If the colour does not justify the rate, do not buy it, and say so. We would rather lose the sale than have you take our word for something we have not evidenced.

And there is no laboratory report

Worth its own heading at this price. No stone in this category has a laboratory report, this one included, and its treatment has not been tested. Two of the names we were given for this category claimed certification; both were refused for that reason.

Tanzanite is imitated more than most gems – by coated quartz, by glass, and by synthetic forsterite, which is a convincing blue-violet. At Rs. 47,250 a report from an independent laboratory is a sensible thing to insist on, and we will arrange one.

Treatment

Rough tanzanite is usually brown. Almost all tanzanite is heated to produce the blue-violet colour it is known for: standard across the trade, stable, permanent, and not a defect. The honest expectation for any tanzanite, including this one, is that it has been heated.

Cleavage and care

Mohs 6 to 7, and more importantly perfect cleavage in one direction – a plane along which a knock can split the stone cleanly whatever its hardness. At six carats this is a pendant stone or a protected ring, set in a bezel. No ultrasonic cleaner, no steam, no sudden heat. Warm water, mild soap, a soft brush.

Where it comes from

Commercial tanzanite comes from a single deposit a few square kilometres across in the Merelani Hills of Tanzania – a fact about the species, not paperwork for this stone.

Ordering

One stone, sold once. Message us on WhatsApp for photographs of the actual stone before ordering, and we deliver across Pakistan.

This particular stone

This listing is one natural tanzanite with a weight of 6.3 Carat. Its price is Rs. 47,250 — roughly Rs. 7,500 for each carat. Origin: Tanzania. Treatment: treatment not tested. Quote reference GS-00033 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 tanzanite rates 6 to 7. That is middle-of-the-road hardness: comfortable in pendants and earrings, and in rings worn with some care. Store it apart from harder stones so it does not pick up scratches, and wipe it with a damp cloth rather than scrubbing.

Whoever you buy tanzanite 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 tanzanite 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): Almost all tanzanite is heated to produce its blue-violet colour; this is standard and 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.