Real or Fake Moti: How to Check a Pearl Before You Pay

A pearl is one of the easiest gems to imitate and one of the easiest to check, provided you know 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 a cheap loupe can answer the first question in under a minute. The second almost always needs a laboratory. The third sits in between.

This guide walks through each in turn, with the checks you can do at home in Pakistan and the ones you should leave 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 one.

Three kinds of "moti" in the market

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

• Natural pearls formed inside a mollusc with no human help. The old Gulf pearls once traded in the subcontinent as "Basra moti" were natural. They are now rare, 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 made of genuine nacre and are what most honest sellers offer.
• Imitations are not pearls at all. They are glass, plastic or shell beads with a pearly coating. Some are sold openly as fashion jewellery; the problem starts when they are sold as moti.

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

How imitation pearls are made

Knowing the construction tells you where to look.

Coated glass beads

A glass ball is dipped repeatedly in a lacquer that contains crushed fish scale or a synthetic pearly pigment. These can look convincing on a strand and feel heavy in the hand, which fools people who rely on weight alone.

Plastic beads

Cheaper and very light. The coating often wears through quickly and they feel warm almost at once.

Shell pearls

A bead cut from mother-of-pearl shell and 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

None of these needs special equipment beyond a 10x loupe, which is cheap and worth owning if you buy gems at all. Do several checks, not one: each has limits.

1. The tooth test

Rub the pearl lightly along the biting edge of your front teeth. Nacre is made of tiny overlapping plates, and 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 do it gently; you are feeling the surface, not biting it.

2. Rub two pearls together

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

3. Look at the surface under a loupe

Real nacre shows a fine, wavy, contour-map pattern of overlapping layers. Coated beads look smooth and grainy, sometimes with tiny bubbles or a slightly 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. Check the drill hole

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

5. Temperature and weight

Real pearls feel cool when you first touch them and warm up slowly. Plastic feels warm almost at once. Weight is a weaker test: glass imitations can feel heavier than real pearls, and plastic lighter. Use it only to back up the others.

6. Look at the matching

On a strand, real pearls vary slightly in shape, size, colour and lustre, even in a well-matched set. A strand where every bead is identical, perfectly round and the same tone is more likely made in a factory.

A test to skip

You may be told to hold a flame to a pearl. Do not do it. 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

The 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 largest price difference sits.

• Natural or cultured: laboratories use X-ray imaging to look at the internal structure. A bead-nucleated cultured pearl shows a round core; a natural pearl shows concentric growth rings. Tissue-nucleated cultured pearls can be harder to separate and need experienced staff.
• Saltwater or freshwater: trace-element testing can usually separate them, which matters for price.
• Colour origin: whether a dark or golden colour is natural or produced by dye or irradiation.
• Nacre thickness: on bead-nucleated pearls, how much nacre covers the bead, which affects durability.

If someone offers you a "natural Basra moti" at a natural-pearl price, ask for a report from an independent laboratory before money changes hands. We can arrange independent lab testing on request; see our lab-certified gemstones page and our authenticity page for how that works.

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 common ones:

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

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

Weight, ratti and the price trap

Pearls in Pakistan are often sold by carat or ratti for ring stones. Remember that the standard gem ratti is 0.91 carat, while a jeweller's sunari ratti is smaller, about 0.61 carat, so always ask which ratti a seller means. Our carat to ratti converter does the arithmetic. A low per-ratti quote for a "natural" pearl is the clearest warning sign there is: genuine 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. Do not pay a natural price on a seller's word.
2. See the actual pearl. A photo of the exact pearl you will receive is far more useful than a stock image.
3. Get treatments and type in writing. Natural or cultured, freshwater or saltwater, and any treatment.
4. Use a payment method that lets you check first. With Cash on Delivery you can open the parcel, do the tooth test and look with a loupe before you pay.
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 disclosed. 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 planned pearl buying guide covers lustre, shape and size in more depth.

Looking after a genuine pearl

Pearls are soft, about 2.5 to 4.5 on the Mohs scale, and sensitive to acids. Perfume, hair spray, 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 genuine pearl looked after this way keeps its glow for decades; an imitation's coating will usually start to peel within a few years of regular wear, which is one more way the difference shows itself in the end.

We deliver anywhere in Pakistan with Cash on Delivery, dispatch in one to two working days and accept returns within seven days. Questions about a specific pearl can go to WhatsApp on +92 308 887 3888.

Shop the stones: pearl.