Surface Examination: Real pearls have a slightly gritty surface, while imitation pearls are typically smooth and shiny.

Shape Assessment: Authentic pearls are rarely perfectly round and may feature slight imperfections. Imitation pearls, on the other hand, tend to be more uniform in shape and size.

Nacre Thickness: South Sea pearls are known for their thicker nacre, which can range from 2-4mm

Color: Real pearls are rarely uniform in color. White pearls may have pink, yellow, or blue shades, while dark pearls may have flashes of green, purple, and navy blue. If you notice a different color around the hole, it is most likely that pearl is not real.

Unique Luster: In real pearls, the luster is alive, thanks to slightly visible transparent layers, it looks like it is coming out of the depth and naturally reflects light. In the case of imitation, the luster is slightly muffled, shallow and dark.

Thickness of Mother-of-Pearl: This feature can only be examined by using X-rays.

Weight: Real pearls are heavy, their weight is like glass or marble

Temperature: Real pearls are cold, and they change temperature while wearing

Elasticity: Real pearls are elastic, after throwing them on a flat surface, they bounce up to half of height. In contrast, plastic pearls bounce higher and glass pearls lower.

Boiling Water Test: The authenticity of the pearl can also be checked by soaking in boiling water, when the real pearl comes out unscathed, and the imitation is damaged.