You're holding a necklace and wondering whether the pearls are real or fake? It's a common question — and for good reason: some imitations today are visually very convincing. Yet a few simple tests can settle the matter in seconds.
The fundamental difference: natural nacre versus artificial coating
A cultured pearl is a pearl whose formation was initiated by humans — by inserting a nucleus into a mollusc — but whose nacre is entirely produced by the animal. This nacre, composed of aragonite crystals and conchiolin, is the same material as that of natural pearls. It has unique optical and tactile properties that no industrial coating can perfectly replicate.
The most common imitations are glass pearls (Majorica pearls, Roman pearls), plastic pearls, and shell pearls coated with a thin layer of artificial nacre. Each can be quickly identified.
The tooth test: the most reliable and simplest
Gently rub the pearl against the edge of your front tooth. A real cultured pearl — whether Akoya, Tahitian, South Sea or freshwater — produces a slightly gritty, sandy sensation. It's the crystalline structure of the nacre that creates this characteristic friction.
A glass or plastic imitation slides smoothly, with no resistance whatsoever.
Visual examination: look for imperfection
Nature never produces two absolutely identical pearls. On a strand of genuine cultured pearls, you'll observe:
- Slight colour variations from one pearl to another
- Micro-imperfections on the surface (small bumps, slight waves, tiny spots)
- Reflections that vary with the angle — this is the pearl's orient
The cold test
A real cultured pearl is naturally cold to the touch and takes a few moments to reach your skin temperature. A plastic pearl warms up almost instantly.
Examine the drill hole
On a real cultured pearl, the hole reveals concentric layers of nacre. On a glass imitation, the edge is sharp and perfectly circular.
Buying with confidence
The best guarantee is to turn to a specialised house. At Pearls & Colors, every piece is made with selected cultured pearls — Akoya, Tahitian, South Sea or freshwater — whose authenticity and provenance we guarantee.