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What does AAA pearls mean? A complete guide to natural pearl quality
When you're looking for natural pearl jewelry, you inevitably come across terms like AAA, AA+, AA, or A. What do these grades mean? Why does an AAA pearl necklace cost more than an AA one? And how do you know you're paying for real quality?
This guide explains everything you need to know before buying natural pearl jewelry.
The pearl grading system — where it comes from
There is no single international standard for grading pearls, unlike diamonds (which have GIA). In the pearl industry, the most widespread system used by producers and retailers worldwide divides quality into four main grades: AAA, AA+, AA, and A.
Grading is based on five criteria: luster, surface, shape, color, and size. The better a pearl meets all five criteria simultaneously, the higher its grade.
Luster — the most important criterion
Luster is the deep, almost mirror-like glow that a quality pearl possesses. It's not a surface shine like polish or paint — it's a light that seems to come from within the pearl.
AAA Pearls: exceptional luster, sharp reflections, you can practically see your own reflection in the pearl.
AA+ Pearls: very good luster, visible but slightly more diffused reflections.
AA Pearls: good luster, acceptable for medium-quality jewelry.
A Pearls: poor luster, dull or chalky surface — to be avoided.
Poor luster does not improve over time. If a pearl looks dull when new, it will look the same or worse after a few years.
Surface — how many imperfections are acceptable
Natural cultured pearls form in live mollusks, in a process that takes 2-5 years. It is almost impossible for a pearl to be completely perfect — even the best ones sometimes have minor surface variations.
AAA Pearls: surface 95% or more free of visible inclusions. Any imperfections are minuscule and visible only under magnification or intense direct light.
AA+ Pearls: 75-95% of the surface free of imperfections. Small spots or slight wrinkles possible.
AA Pearls: 50-75% clean surface. Imperfections visible to the naked eye.
A Pearls: under 50% clean surface. Clearly visible inclusions, cracks, or spots.
When buying pearl jewelry, ask to see it in natural light, not just under the yellow showroom lights that hide imperfections.
Shape — round doesn't always mean better
Shape affects the price, but it doesn't solely determine the quality of a pearl.
Round: the rarest and most expensive. A truly round pearl, verified with a gauge, is exceptional.
Near-round: the difference from perfectly round is less than 2%. Practically impossible to detect with the naked eye.
Drop/Teardrop: elongated, elegant shape. Perfect for pendants and dangle earrings.
Oval: classic, frequently used in necklaces.
Baroque: irregular, asymmetrical shapes. They are not flaws — they are unique. Baroque pearl jewelry has a distinct artistic character.
Keshi: nucleus-free pearls, resulting from a production accident. Flat or irregular, with exceptional luster precisely because they are entirely made of nacre.
Color — natural vs. treated
The color of natural freshwater cultured pearls varies naturally: white, cream, pink, lavender, purple, champagne, orange. These colors are authentic and do not fade.
Be careful with black or gold freshwater pearls — these are almost always chemically treated or dyed. Natural black pearls exist, but they come exclusively from Pinctada margaritifera oysters cultivated in Tahiti, and cost significantly more.
How to check if a pearl is dyed: look at the drill hole. If the color at the hole is different from the surface, the pearl is treated.
Size — how it influences price
Pearl size is measured in millimeters in diameter. The price increase is not linear — the larger the pearl, the rarer and more expensive it is.
- 3-5mm: small, delicate. Perfect for multi-strand necklaces or minimalist jewelry.
- 6-7mm: classic size for necklaces and stud earrings.
- 7-8mm: preferred size for premium earrings and pendants.
- 8-9mm: large, impressive pearls. The price increases significantly compared to 7-8mm.
- 9-10mm and above: rare, precious. Specific to luxury collections.
How to recognize a natural pearl from an artificial one
The simplest test: gently rub the pearl against the edge of your teeth. Natural pearls have a slightly granular, sandy texture — this is the nacre formed from hundreds of crystalline layers. Artificial pearls (made of glass or plastic) are perfectly smooth, slippery.
Other signs of real quality:
- Weight: natural pearls are heavier than plastic ones
- Temperature: natural pearls are initially cool to the touch, warming up upon contact with the skin
- Luster: deep, not superficial
Why AAA quality matters for fine jewelry
At Royal Pearls, all jewelry is made with AAA and AA+ quality natural freshwater cultured pearls, set in 14K (585) gold. We choose only pearls with exceptional luster and a clean surface precisely because quality jewelry must remain beautiful for 10, 20, or 30 years.
The difference between an AAA and an AA pearl may seem small in pictures. When worn, in natural light, the difference in luster is immediate and visible.
If you want to discover what an AAA pearl looks like in finished jewelry, explore or .
Conclusion
The AAA grade is not just marketing — it represents objective criteria for luster, surface, shape, and size. When buying natural pearl jewelry, always ask about the quality of the pearls used. An AAA pearl piece costs more initially, but it retains its beauty long-term and becomes a heirloom piece.
