Cultured pearls vs. natural pearls: what is the difference?

Cultured pearls are real pearls. The difference from natural pearls is human intervention in initiating the formation process, not their authenticity. Both grow in mollusks, unlike imitations made to reproduce the appearance of pearls.

Confusion arises because, in everyday language, "natural" is often used to mean "authentic". In gemology, however, the terms have distinct meanings. Here is what each means and what matters when choosing a piece of jewelry.

What are cultured pearls and how are they formed?

Cultured pearls are formed in living mollusks, as a result of an intervention that initiates the process. Depending on the type of pearl, specialists introduce a piece of tissue, sometimes together with a nucleus. The mollusk then deposits layers of nacre, and the pearl grows over time.

So, "cultured" does not mean that the pearl is cast in a mold or made of glass or plastic.

Cultured pearls can come from fresh or salt water. Among the main categories are freshwater pearls, Akoya, Tahitian, and South Sea pearls.

What are natural pearls?

Natural pearls are formed without human intervention. They are rare, and many of those sold today are found in vintage jewelry or collectible pieces.

The majority of pearls available in contemporary jewelry stores are cultured. This does not make them any less authentic: the term describes how their formation begins.

Natural pearls vs. cultured pearls: the main differences

Characteristic	Natural pearls	Cultured pearls
Start of formation	Without human intervention	Initiated with human intervention
Where they are formed	In mollusks	In mollusks
Authenticity	Authentic pearls	Authentic pearls
Availability	Very rare	They make up the majority of pearls in commerce
Identifying the origin	May require gemological analysis	May require gemological analysis

The difference cannot be determined with certainty just by the round shape, luster, or small imperfections.

What does "natural cultured pearls" mean?

It is an expression frequently encountered in commercial descriptions. Usually, it tries to convey that the pearls are authentic, not imitations.

However, according to the Gemological Institute of America — GIA, the term "natural" should be reserved for pearls formed without human intervention. The correct term for those grown is "cultured pearls".

For buyers, the useful information is concrete: what type of pearl the jewelry contains, what size it is, and whether it has been subjected to treatments.

Can you distinguish natural pearls from cultured ones at home?

Not with certainty. A photograph, weight, or texture are not enough to determine whether a pearl was formed with or without human intervention.

Gemological laboratories use radiography, among other methods, to examine the internal structure. For a high-value piece presented as jewelry with natural pearls, a gemological report is relevant.

Popular tooth-rubbing tests cannot prove natural or cultured origin. Also avoid scratching tests, which can damage the surface.

Are natural pearls always more valuable?

Rarity can increase the value of a natural pearl, but it is not enough to compare two pieces of jewelry based on this label alone.

Several factors matter when evaluating pearls:

• Luster: how clear and intense the reflections are.
• Surface: the number and extent of imperfections.
• Size, shape, and color.
• Nacre quality.
• Pearl matching: important in a pair of earrings or a necklace.

The price of the jewelry also includes the metal, design, and craftsmanship. A cultured pearl is not automatically of lower quality just because its formation process was initiated by a human.

How do you choose a piece of jewelry with cultured pearls?

Start with information about the material, then choose the proportions and design that suit you.

Before buying, check:

• Whether the pearls are cultured and come from fresh or salt water.
• The sizes of the pearls and the jewelry.
• Whether the hue is natural or the result of a treatment.
• The metal used: solid gold, silver, or a material with a gold layer.

For a gift, observe what the person already wears: understated jewelry or expressive designs, small earrings or necklaces that catch the eye. The authenticity of the material matters, but also how the jewelry integrates into their style.

What pearls do we use at Atelier Devi?

At Atelier Devi, we use freshwater cultured pearls. We select them for luster and surface, then match them according to shape, size, and hue.

In a pair of earrings, we ensure balance between the pearls. In a necklace with baroque shapes, irregular contours can become the very focal point of the design.

For understated proportions, the Soraya earrings in 14K solid gold with cultured pearls combine 10 mm hoops with 4 mm pearls.

If you prefer organic shapes, the Star necklace with baroque pearls and twisted gold highlights the contours of the pearls in a design close to the neck.

Explore our collections of earrings with pearls and necklaces with pearls.

But what category do Mallorca pearls fall into?

Mallorca pearls are imitations, not natural or cultured pearls. They are made by humans to reproduce the appearance of pearls, without growing in a mollusk.

We explained the materials and differences separately in the guide to Mallorca pearls vs. cultured pearls.

For a piece of jewelry with authentic pearls, you do not necessarily need to look for rare natural pearls. Cultured pearls are an authentic choice; the difference between two pieces of jewelry is worth looking for in the quality of the pearls, materials, and craftsmanship.