A natural tanzanite of 4.70 carats, about 5.16 ratti, at Rs. 9,750 – roughly Rs. 2,074 per carat. Its colour is recorded as Blue.

Read this before you set it in a ring

We would rather talk you into the right setting than sell you a stone that breaks.

Tanzanite is Mohs 6 to 7, which is already softer than the sapphire a man's ring usually carries. But the real hazard is that tanzanite has perfect cleavage in one direction. That means a plane inside the crystal along which it will split cleanly if struck the wrong way – not chip, split. Hardness does not protect against it. A single knock against a door frame can do it.

So, if this is going into a men's ring:

• Ask for a bezel, a full rim of metal around the stone, rather than claws. It is the single biggest thing you can do.
• Take the ring off for manual work, the gym, and anything involving tools.
• Never let a jeweller put it in an ultrasonic cleaner, and have him work at low heat if the setting needs torch work – better still, have the stone set last.

Worn with that much care it will last indefinitely. Worn like a sapphire ring, it may not last a year.

About the photograph

The image on this listing is a catalogue photograph used across all nine tanzanite listings on this site, not a photograph of this stone – we compared the nine files and they are one image, some of them mirrored. Message us and we will send photographs and a video of the actual stone. Its shape, cut, clarity and dimensions are not recorded either; only its weight, price and recorded colour are specific to it.

Treatment

Rough tanzanite is usually brown, and almost all tanzanite is heated to bring out the blue-violet colour. It is standard, stable and permanent. For this stone the treatment has not been tested and there is no laboratory report.

At this size and rate

Four and a half carats and up is a substantial stone for a man's ring, and at Rs. 2,074 per carat this one sits near the bottom of our range, which runs from Rs. 1,909 to Rs. 9,750 per carat across the nine. What separates the dearer stones is colour, and the shared photograph gives us no way to show you that – so ask.

Where it comes from

Commercial tanzanite comes from one deposit on earth, in the Merelani Hills of Tanzania. That is a fact about the species; we hold no provenance paperwork for this stone.

Ordering

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

This particular stone

This listing is one natural tanzanite with a weight of 4.7 Carat. Its price is Rs. 9,750 — roughly Rs. 2,074 for each carat. Origin: Tanzania. Treatment: treatment not tested. Quote reference GS-000896 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 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.