You can tell real pearl earrings by four signs: a faintly gritty feel when the pearl is rubbed gently against a tooth, cool weight in the hand, tiny surface irregularities under a loupe, and a crisp nacre edge where the pearl meets the post. Imitations are warm, light, flawless-looking, and often peel exactly at the setting.

We grade pearls for a living, and the honest news is that you don't need a lab for earrings. Fakes fail at the same few points every time. Here is the routine we'd run on any pair, in a shop or at your own kitchen table.

One thing worth saying first: "real" includes cultured. A cultured pearl earring holds a pearl grown by a living oyster over many months of nacre-building; what you're screening out are coated glass and plastic beads sold under soft names like "shell pearl", "organic pearl" or "South Sea style". The tests below catch those — and they won't harm a genuine pearl, so run all four with a clear conscience.

Four checks you can do in minutes

• The tooth test. Rub the pearl softly along the edge of a front tooth. Real nacre feels finely gritty, like silk with sand in it; glass and plastic glide smooth.
• Temperature and weight. A real pearl starts cool and warms slowly in your palm. Plastic is warm in seconds and oddly light for its size.
• The loupe look. Under 10x magnification, real pearls show faint ridges, growth lines and the odd pinpoint. A surface that looks sprayed-on and identical everywhere usually was.
• The twin problem. Real pairs are well matched, never identical. Two pearls that match like stamped buttons, at a bargain price, are telling you what they are.

Look where the pearl meets the post

The drill area is where imitations confess. On a real cultured pearl the hole's rim is clean and sharp, and with a loupe you can often see the nacre layer sitting over the nucleus like enamel on a tooth. On coated beads the paint chips, flakes or bunches at exactly that point, because the post rubs it every time the earring is worn. Ask the seller for a macro photo of the post area; a good dealer will send it without blinking. On screw-back and push-back studs, check the cup where the pearl is glued to the post as well — on real pearls the glue line is thin and tidy, while imitations often hide their worst flaking right under that little cap. It's the same drill-hole logic we use in our guide to telling if a Tahitian pearl is real, and it works on every species.

Reading the listing like a grader

Most fakes are caught before they're touched, just by reading carefully. A trustworthy listing names the species with its Latin binomial — Akoya (Pinctada fucata), South Sea (Pinctada maxima), Tahitian (Pinctada margaritifera) — gives the size in millimetres, states the metal, and shows the actual pair you will receive. Vague "genuine shell pearl" wording is a polite way of saying coated bead. Size claims matter too: if a pair is sold as 8 mm, our earring size chart in mm shows you exactly how large that should look against an ear.

Quick questions, straight answers

Are cultured pearl earrings real pearls?

Yes. A cultured pearl is grown by a living oyster that builds real nacre, layer by layer, over months — the farmer only starts the process. "Imitation" or "shell pearl" means a coated bead no oyster ever touched. Cultured and fake are opposites, not synonyms.

How much should real pearl earrings cost?

Honest freshwater studs start around the price of a nice dinner; Akoya pairs sit comfortably above that; South Sea and Tahitian earrings climb from there with size and quality. A "South Sea" pair at pocket-money prices isn't a bargain — it's a different product wearing the name.

Can I tooth-test a pearl that's already set?

Usually, yes. The pearl's face is exposed on most studs and drops, so a gentle rub on the upper curve works fine. Be slow and light — you're feeling for texture, not carving your initials.

If you'd like to feel the difference for yourself, our South Sea pearl earrings are farm-sorted, photographed individually, and we'll gladly send the loupe shots before you decide.