One noticeable stone rather than a cluster of small ones: that is the brief this 2.5 carat Australian opal fits. It will suit a pendant wearer, or someone planning a ring that will be worn with a little care. Its reference is AG-000703.

What you are getting

A natural fire opal from Australia. Opal is valued mainly on how its colour behaves when you turn it under light, so the real photographs on this page matter more than any adjective we could add. Look at them in daylight if you can, and ask us on WhatsApp for a short video of the stone moving. That is the honest way to choose an opal online.

On treatment, be sensible. Solid opal is normally sold as it came from the ground, but smoke and sugar treatments exist, and so do doublets and triplets. We sell solid natural opal only. Ask us about this exact stone and we will tell you what we know. Independent lab testing is your choice to make.

Wearing it

At 5.5 to 6.5 on the Mohs scale, opal is softer than quartz, so keep it away from knocks and gritty dust. A pendant or earring gives it the easiest life; a ring is fine if you take it off for housework. Browse the rest of our loose opal range to compare nearby sizes, and read our gemstone buying guide too.

Cash on Delivery means you see the stone before paying. Karachi usually 1–2 working days, other cities 2–4, and unused stones can come back within 7 days.

This particular stone

This listing is one natural australian opal with a weight of 2.5 Carat. Its price is Rs. 18,750 — roughly Rs. 7,500 for each carat. Origin: Australia. Treatment: treatment not tested. Quote reference AG-000703 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.

Whoever you buy australian 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 australian 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.