Three questions come up again and again about tanzanite, and they apply to this 4.15 carat stone too.

Will the colour last?

Yes. Nearly all tanzanite is heated to reach its blue-violet colour, a settled and stable practice, so you should not expect it to fade with normal wear. This is a natural tanzanite from Tanzania.

Can I wear it every day?

Tanzanite is 6 to 7 on the Mohs scale, softer than sapphire or ruby. A pendant or earrings are the safest choices. For a ring, pick a bezel setting and avoid knocks.

Is it good value?

It carries a gentler per-carat rate than some of our other tanzanites, and delivery is a flat Rs. 500 for the order.

Keep it away from steam cleaners and sudden changes of temperature, and wipe it with a soft damp cloth after wearing. Store it in its own pouch so harder stones cannot scratch it. Reference AG-000475. Want to know more about this exact stone? Message us on WhatsApp. More choices are in the tanzanite category.

The parcel comes Cash on Delivery, so the stone is in your hand before you pay a rupee. Karachi: usually 1–2 working days. Elsewhere in Pakistan: usually 2–4. Returns: 7 days, unused and in its packing. Read our tanzanite guide too.

This particular stone

This listing is one natural tanzanite with a weight of 4.15 Carat. Its price is Rs. 8,630 — roughly Rs. 2,080 for each carat. Origin: Tanzania. Treatment: treatment not tested. Quote reference AG-000475 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, 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. No lab report yet; independent testing welcome. 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.