The first thing you notice when you pick up a 1.80 carat opal is how light it feels. Opal is less dense than most gems, so a stone of this weight looks a bit larger in the hand than a sapphire of the same carat weight would.

That makes it well suited to a statement pendant. For a stone of this size in opal, the rate per carat is comfortable. The reference is AG-000597.

Weight in context

By opal standards, 1.80 carats is mid-sized: big enough to read as a proper stone, yet still within a modest budget. Larger opals usually cost more per carat, which is why a piece like this is the sweet spot for many buyers.

Colour, hardness and treatment

It is a natural fire opal with play of colour. Hardness is 5.5 to 6.5 on the Mohs scale, so it prefers pendants and rings worn on occasions. Whole opal is usually sold natural, although darkened stones and doublets exist. Ours is solid natural opal, and we will tell you what we know about this one if you ask on WhatsApp. Independent testing is up to you.

Similar stones are in the opal collection, and the opal guide has more background.

Look it over at the door, then pay the rider in cash. Karachi orders usually arrive in 1–2 working days, other major cities in 2–4, and there is a 7-day return window.

This particular stone

This listing is one natural opal with a weight of 1.8 Carat. Its price is Rs. 4,880 — roughly Rs. 2,711 for each carat. Treatment: treatment not tested. Quote reference AG-000597 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.

Under two carats, a stone like this sits neatly in a slim ring, a stud or a delicate pendant and does not snag on sleeves. It is also where many first-time buyers begin when a stone is recommended for astrological reasons, because the total cost stays modest.

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.