Some opals are quiet and some are loud, and the only way to know which one you have is to watch the colour move. This 2.55 carat stone is a natural fire opal from Australia with play of colour, and those flashes are the whole reason to buy it. Ask us on WhatsApp for a short video and you will see far more than a still photo can show.

The reference is AG-000608.

Opal is soft, 5.5 to 6.5 on the Mohs scale, so the best use for a stone of this size is a pendant, or a ring worn on your less busy hand for special days. Hot water, steam, ultrasonic cleaners and sudden changes of temperature all stress opal, so avoid them. A soft damp cloth is all the cleaning it needs, and it should be stored on its own in a pouch.

A short note on treatment. Whole opal is mostly left as found, but darkened opal exists, and doublets and triplets are common in the market. We sell solid natural opal. Send us the reference on WhatsApp and we will tell you what we know about this exact stone. Independent lab testing is your decision.

The rest of our opal stones are on the category page, and our gemstone buying guide covers the general points.

Cash on Delivery lets you look before you pay. Karachi usually 1–2 working days, the rest of Pakistan 2–4, returns within 7 days.

This particular stone

This listing is one natural australian opal with a weight of 2.55 Carat. Its price is Rs. 21,380 — roughly Rs. 8,384 for each carat. Origin: Australia. Treatment: treatment not tested. Quote reference AG-000608 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.