Buying Pearl Jewelry: What Distinguishes Real Pearls from Faux Pearls

Pearls are the oldest jewelry material in the world. Before jade, before gold, before diamonds, people wore pearls. And they are also the most frequently imitated jewelry material – glass pearls, plastic pearls, wax pearls: almost everything gets the name "pearl" without truly being one. Anyone wanting to buy genuine pearl jewelry needs to know the difference.

What a real pearl is

Real pearls (cultured pearls and natural pearls) are formed in living mollusks – mussels or snails – in response to a foreign body in their tissue. The animal layers nacre around the foreign body until a pearl is formed. In cultured pearls, the foreign body is introduced into the animal through human intervention.

The crucial difference from imitations: Real pearls consist of aragonite and organic proteins. They have a characteristic inner luster – light shines through the nacre. Imitations only reflect from the surface.

Simple authenticity test: Gently rub the pearl against your teeth. Real pearls feel slightly sandy or rough – due to the nacre structure. Glass pearls or plastic pearls are completely smooth.

Pearl Types: The Most Important Differences

Akoya Pearls: Classic Japanese saltwater cultured pearls. Round, white to cream white, with a characteristic high luster (shine). Typically 6–9 mm in diameter. The classic pearl necklace consists of Akoya pearls. Price: medium to high, depending on quality.

South Sea Pearls: Large saltwater cultured pearls from Australia, Indonesia, and the Philippines. Diameter 10–20 mm, rarely up to 25 mm. White to golden shimmer. Rarer and significantly more expensive than Akoya. The most impressive jewelry material in the pearl world.

Tahitian Pearls: From black-lipped oysters in French Polynesia. Characteristic dark colors: black, green, bronze, peacock blue. Diameter 8–14 mm. Fascinating color depth that no other pearl can replicate.

Freshwater Pearls: In freshwater mussels, mainly from China. Wide color palette, various shapes (round, oval, baroque). Significantly cheaper than saltwater pearls, but very beautiful if of good quality. The most democratic pearl – accessible for all budgets.

Quality Criteria: How to Recognize Good Pearls

Luster: The most important characteristic. High-quality luster is deep and shines from within, not just from the surface. A good pearl shows your reflection when you get close.

Surface: Natural inclusions (small irregularities) are normal and not a quality defect. What is problematic: deep scratches, cracks, or flaking surfaces.

Roundness: Perfectly round pearls are rarer and more expensive. Baroque pearls (irregular shape) have their own character and are often more affordable.

Size: Larger pearls are rarer and more expensive. For freshwater pearls, 8–10 mm is a good everyday size. Above 12 mm begins the premium range.

Knotting: The Quality Mark That Is Hardly Noticed

In high-quality pearl necklaces, there is a small knot in the thread between each individual pearl. This serves two purposes: The pearls do not rub against each other (prevents scratches), and in case of a thread breakage, you only lose one pearl, not the whole necklace.

Pearl necklaces without knotting are cheaper to produce – not a sign of quality. For valuable pearl necklaces, knotting is standard.

Pearl jewelry – pearls combined with 585 gold – at Corelune.

→ Further reading: Cleaning Jewelry: The Complete Guide | Storing Jewelry: How to Keep It Beautiful for a Long Time

Frequently Asked Questions About Pearl Jewelry

How do I recognize real pearls?

Tooth test: Gently rub against your teeth. Real pearls feel slightly gritty. Also: Luster test – real pearls show a reflection, imitations only reflect diffusely. Under UV light, real pearls react with a milky-blue fluorescence, many imitations do not.

Are freshwater pearls inferior to Akoya pearls?

Not categorically. Good freshwater pearls in a round shape with high luster can reach or exceed Akoya quality. The main advantage of Akoya is its classic, uniform luster and round shape as standard. Freshwater pearls offer more variety in shape and more affordable prices.

How do you care for pearl jewelry?

After wearing, gently wipe with a damp, soft cloth. No cleaning agents, no soaking, no ultrasound. Store separately from other jewelry, in a soft cloth or pouch. Have pearl strands re-knotted every 2–3 years if worn regularly.

Is pearl jewelry suitable for everyday wear?

With limitations. Pearls (Mohs 2.5–4.5) are very soft – daily abrasion leaves marks. For everyday wear, better: pearl stud earrings or pendants on a chain (less friction than a ring or bracelet). Wearing a pearl necklace daily and intensively is not recommended in the long run.