Asli Moti or Not? Checking a Pearl Before You Pay

Pearls are among the easiest gems to fake and among the easiest to check, as long as you are clear about which question you are asking. "Is this a real pearl?" can mean three different things. Is it a pearl at all, or a coated bead? If it is a pearl, is it natural or cultured? And has it been dyed, bleached or coated? Your teeth, your eyes and an inexpensive loupe can settle the first question in less than a minute. The second nearly always needs a laboratory. The third falls somewhere in between.

We take each question in turn below, with the checks you can do at home in Pakistan and the ones best left to a lab. If you want to know what sets a pearl's value once you know it is genuine, read what decides a pearl's price alongside this.

The three kinds of "moti" on sale

Before any test, it helps to know what you might be holding.

• Natural pearls form inside a mollusc with no human help. The old Gulf pearls once traded across the subcontinent as "Basra moti" were natural. They are rare now, and most stones sold under that name today are not natural.
• Cultured pearls are real pearls grown on farms after a farmer inserts a bead or a piece of tissue. Freshwater, Akoya, South Sea and Tahitian pearls are all cultured. They are genuine nacre, and they are what most honest sellers offer.
• Imitations are not pearls at all: glass, plastic or shell beads with a pearly coating. Some are sold openly as fashion jewellery; the trouble starts when they are sold as moti.

Most fraud in our market falls into two traps: imitations sold as real pearls, and cultured pearls sold as natural "Basra" at a natural-pearl price. You can catch the first yourself. The second needs a lab.

How fake pearls are made

Knowing how they are built tells you where to look.

Coated glass beads

A glass ball is dipped again and again in a lacquer containing crushed fish scale or a synthetic pearly pigment. On a strand they can look convincing and feel heavy, which fools people who go by weight alone.

Plastic beads

Cheaper and very light. The coating often wears through quickly, and they feel warm almost straight away.

Shell pearls

A bead cut from mother-of-pearl shell and then coated. Because the core is shell, some sellers argue they are "made from pearl". They are still imitations, and they are often perfectly round and perfectly matched, which real pearls rarely are.

Checks you can do at home

You need nothing more than a 10x loupe, which is cheap and worth owning if you buy gems at all. Do several checks rather than one, because each has its limits.

1. The tooth test

Rub the pearl gently along the biting edge of your front teeth. Nacre is made of tiny overlapping plates, so a real pearl, natural or cultured, feels slightly gritty or sandy. Glass, plastic and most coated beads feel smooth and slippery. Clean the pearl first and be gentle: you are feeling the surface, not biting it.

2. Rub two pearls together

On a strand, rub two pearls lightly against each other. Real pearls feel faintly rough, and you may see a trace of fine powder that wipes off without leaving a mark. Imitations slide past each other. Do not press hard, as you can scratch genuine nacre.

3. Study the surface with a loupe

Real nacre shows a fine, wavy pattern of overlapping layers, a bit like a contour map. Coated beads look smooth and grainy, sometimes with tiny bubbles or a dull, painted texture. Small spots, pits or bumps are normal in genuine pearls. A surface that is flawless on every bead is a reason to look harder.

4. Look into the drill hole

If the pearl is drilled, look into the hole with the loupe. On imitations the coating often chips or peels at the edge, with glass or plastic showing underneath. On a cultured pearl you may see a sharp line between the bead nucleus and the nacre around it, which confirms it is a pearl and shows roughly how thick the nacre is.

5. Temperature and weight

Real pearls feel cool at first and warm up slowly; plastic feels warm almost immediately. Weight is a weaker test, because glass imitations can feel heavier than real pearls and plastic lighter. Use it only to support the other checks.

6. Look at the matching

On a strand, real pearls differ slightly in shape, size, colour and lustre, even in a well-matched set. If every bead is identical, perfectly round and the same tone, it is more likely to have come from a factory.

One test to skip

Someone may tell you to hold a flame to a pearl. Don't. Heat can damage genuine nacre, and some coatings survive a quick flame anyway, so you risk ruining a real pearl to learn very little.

What only a lab can tell you

Home checks tell you whether you have a pearl. They cannot reliably tell you whether it is natural or cultured, and that is where the biggest price gap lies.

• Natural or cultured: labs use X-ray imaging to see the internal structure. A bead-nucleated cultured pearl shows a round core; a natural pearl shows concentric growth rings. Tissue-nucleated cultured pearls are harder to separate and need experienced staff.
• Saltwater or freshwater: trace-element testing can usually tell them apart, which matters for price.
• Where the colour came from: whether a dark or golden colour is natural or the result of dye or irradiation.
• Nacre thickness: on bead-nucleated pearls, how much nacre covers the bead, which affects how long it will last.

If anyone offers you a "natural Basra moti" at a natural-pearl price, ask for a report from an independent laboratory before any money changes hands. If you want a report on a pearl from us, tell us before you order; our lab-certified gemstones and authenticity pages explain how we approach this.

Treatments to ask about

A pearl can be genuine and still treated. Treatment is not fraud when it is disclosed; it becomes a problem when it is hidden. The usual ones:

• Bleaching: very common on white freshwater and Akoya pearls to even out the colour. Widely accepted.
• Dyeing: used for black, grey, golden or bright colours. Look for colour gathered in the drill hole or in surface pits.
• Irradiation: can darken pearls to grey or blue-black.
• Coating or polishing: a thin layer to boost lustre, which can wear off with use.
• Filling: some hollow or poor-quality pearls are filled to add weight.

Ask the seller which of these apply and get the answer written on the invoice. We state known treatments on every pearl we list.

Weight, ratti and the price trap

For ring stones, pearls here are often sold by carat or ratti. The standard gem ratti is 0.91 carat, while a jeweller's sunari ratti is smaller, about 0.61 carat, so always ask which one a seller means. Our carat to ratti converter does the maths. A low per-ratti quote for a "natural" pearl is the clearest warning sign you will get: natural pearls are rare, and nobody sells them cheaply.

Buying pearls safely

1. Know what you are paying for. Decide whether you want a cultured pearl at a fair price or a natural pearl with a lab report. Never pay a natural price on a seller's word alone.
2. See the actual pearl. A photo of the exact pearl you will get is worth far more than a stock image.
3. Get the type and treatments in writing. Natural or cultured, freshwater or saltwater, and any treatment.
4. Pay in a way that lets you check first. With Cash on Delivery you open the parcel, do the tooth test and look with a loupe before paying.
5. Keep the return window in mind. If a lab result disagrees with the description, you need time to act.

Every pearl in our pearl (moti) collection is photographed on its own and described as cultured or natural, with treatments stated. Examples include this 10.50 carat moti and this 12.05 carat moti. If you are choosing between pearl and moonstone for a June birthday, our June birthstone page compares them, and the pearl buying guide goes deeper into lustre, shape and size.

Looking after a genuine pearl

Pearls are soft, about 2.5 to 4.5 on the Mohs scale, and acids attack them. Perfume, hairspray, sweat and even lemon juice can etch the surface and dull the lustre. Put pearls on last, wipe them with a soft damp cloth after wearing, and store them flat in a soft pouch away from harder gems. A real pearl cared for like this keeps its glow for decades, while an imitation's coating usually starts to peel within a few years of regular wear, which is one more way the difference reveals itself in the end.

We deliver across Pakistan with Cash on Delivery from our base in Karachi. Orders are dispatched within 1 working day of confirmation; Karachi usually receives them in 1 to 2 working days and other major cities in 2 to 4, and returns are accepted within seven days. Questions about a particular pearl? Message us on WhatsApp.

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