This stone is listed as an antique multi fire opal. To be clear from the start, "antique" describes how it is listed, not a date we can verify. Here is what we can tell you.

• It is natural opal weighing 6.15 carats, reference AG-000728.
• For its size, the rate per carat is modest.
• It is described as multi fire, so more than one colour may appear as you tilt it.
• Hardness is 5.5 to 6.5 on the Mohs scale, so treat it as a soft stone.

Our advice: look at it in daylight when the parcel arrives, check the edges for chips, and keep it wrapped apart from harder gems. Solid opal is usually left as mined, though smoke or sugar treatment exists, and doublets and triplets are traded. We sell solid natural opal, and you are welcome to ask on WhatsApp what we know about this exact stone.

Keep the wrapping for the first week, because an unused stone in its original packaging can be returned within 7 days. Compare more in the opal collection, and read our opal guide for the background.

It ships Cash on Delivery by insured courier. Karachi usually receives it in 1–2 working days, Lahore, Islamabad and other cities in 2–4.

This particular stone

This listing is one natural opal with a weight of 6.15 Carat. Its price is Rs. 10,880 — roughly Rs. 1,769 for each carat. Treatment: treatment not tested. Quote reference AG-000728 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 opal rates 5.5 to 6.5. 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 opal 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 opal 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): Solid opal is usually untreated; some opal is smoke- or sugar-treated, and doublets/triplets exist — we sell solid natural opal. 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.