"Sky blue" describes aquamarine better than most trade terms do, because it sets the right expectation. Not sapphire blue, not turquoise — the soft, light, slightly cool blue of a clear sky. Buyers who arrive expecting something deeper are usually disappointed; buyers who know what the gem actually looks like are usually delighted.

The stone

44.75 carats, which is 49.18 ratti. Rs. 37,500, about Rs. 838 per carat, reference GS-000282. This is the largest aquamarine we currently list, and it is a single piece.

Why size helps a pale stone

This is the part worth understanding before you compare it with a smaller stone. Colour in a transparent gem is a function of how far light travels through it — the longer the path, the more saturated the colour appears. A two carat aquamarine of identical material can look almost colourless; at nearly forty-five carats, the same blue reads clearly across a room. If you want aquamarine to actually look blue rather than merely be blue, size is the cheapest way to get there, because beryl grows large and the per-carat rate barely climbs with weight.

What to do with a 44.75 carat stone

• Pendant. The obvious home. Nothing has to fit, a substantial chain balances the weight, and the full face of the stone stays visible.
• Statement ring. Needs a broad shank and a solid gallery. It will sit well proud of the finger — that is the intention at this size.
• A collector's piece, unset. Perfectly reasonable. A stone this size is worth owning as a stone.

Ask for an open back

It costs nothing to specify and it matters more here than on a dark gem. Light entering from behind is what makes a pale blue glow; a closed back makes the same stone look grey and flat. White metal — 925 silver, white gold, platinum — keeps the blue clean, while yellow gold pushes it towards green.

Is it treated?

Aquamarine is commonly heated to remove green tones and leave a purer blue. The treatment is standard for the gem, permanent and accepted everywhere. We have not had this particular stone tested, so the specification reads "treatment not tested" rather than a claim in either direction. Independent laboratory testing can be arranged, and because you pay on delivery you can also have it checked yourself inside the seven-day return window.

How do I know it is not glass or blue topaz?

At this size the question is worth asking. Glass shows round gas bubbles and swirl lines under a loupe. Blue topaz is noticeably heavier for its size. Natural aquamarine often carries fine parallel tube inclusions that neither imitation reproduces. Our real versus fake gemstones guide covers the checks, and a certificate of authenticity is available on request.

Durability

Beryl is 7.5 to 8 on the Mohs scale — harder than quartz and suitable for regular wear, though a sharp knock on an edge can chip it. A bezel protects better than tall claws. Warm soapy water and a soft brush; avoid steam and ultrasonic cleaners.

Ordering

Shape and measurements have not been recorded for this piece. At this size a jeweller will need them before making a mount, so ask us on WhatsApp at +92 308 887 3888 and we will measure it and photograph it against a scale. Flat Rs. 500 delivery anywhere in Pakistan, insured and tracked, dispatched in one to two working days. Cash on Delivery, seven days to return it unused. See the smaller sizes in the aquamarine collection.

This particular stone

This listing is one natural aquamarine, known in Urdu as Beruj, with a weight of 44.75 Carat. Its price is Rs. 37,500 — roughly Rs. 838 for each carat. Treatment: treatment not tested. Quote reference GS-000282 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.

Above twelve carats you are into collector territory. Pieces this heavy are usually set as pendants or kept loose, and they are prized for the size of rough they came from. If you do set it, choose a bezel or a heavy claw to protect the edges.

On the Mohs scale aquamarine rates 7.5 to 8. It handles daily wear, but a hard knock can still nick an exposed corner, so a protective setting is a sensible choice. Clean it with warm soapy water and a soft brush, and keep it away from abrasive cleaners and high heat.

Whoever you buy aquamarine 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 aquamarine for those three points before it is listed, a certificate is available on request, 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. Certificate available on request. As general background (not a statement about this stone): Aquamarine is commonly heated to remove green tones and leave a purer blue. 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.