Types of Pearls
Four major categories of cultured pearls dominate the world market — each produced by a different species of oyster or mussel, in different waters, with distinct characteristics. Understanding the differences is the first step to choosing the right pearl.
Japanese Akoya Pearls
Japanese Akoya pearls are cultured in Pinctada fucata oysters along the bays and inlets of Japan, with smaller harvests in Korea and China. They range from 2mm to 10mm in diameter and are almost always round or near-round in shape. Akoya pearls are prized for their exceptionally sharp luster — the ability to reflect light with mirror-like clarity — and their classic body colors of white, silver, pink, and rose. Luster and color are two of the dimensions captured in the GIA 7 Pearl Value Factors.
- Size range: 2–10mm (most common: 6–9mm)
- Shape: predominantly round and near-round
- Colors: white, silver, pink, rose overtones
- Known for the highest luster among all pearl types
- The most popular choice for bridal and wedding jewelry
South Sea Pearls
South Sea pearls are cultured in Pinctada maxima oysters — the largest pearl-producing oyster in the world. They grow in the warm waters of Australia, Indonesia, Myanmar, and the Philippines, and range from 8mm to 20mm in diameter. Two distinct varieties exist: white South Sea pearls, produced by silver-lipped oysters, and golden South Sea pearls, produced by gold-lipped oysters and among the rarest cultured pearls available.
- Size range: 8–20mm (most common: 10–15mm)
- Shape: round, oval, drop, baroque
- Colors: white, silver, cream, gold
- Largest cultured pearls commercially available
- Golden South Sea pearls are among the rarest and most valuable
Golden South Sea pearls are the rarest variety — fewer than 1% of all cultured pearls produced worldwide.
Tahitian Pearls
Tahitian pearls are cultured from Pinctada margaritifera (black-lipped oysters) in the lagoons of French Polynesia. Often called “black pearls,” they actually display the widest color range of any pearl type — from metallic silver and steel gray to blue, green, eggplant, and deep black. The most sought-after color is peacock: a strong blend of blue, green, and aubergine overtones that shifts as the pearl catches light.
- Size range: 8–16mm (most common: 9–13mm)
- Shape: round, drop, oval, circle, baroque
- Colors: silver, gray, green, blue, aubergine, black
- The only pearl type with naturally dark body colors
- Peacock overtone is the rarest and most prized
Freshwater Pearls
Freshwater pearls are cultured in rivers and lakes, primarily in China, using the Hyriopsis cumingii (triangle sail mussel). Unlike saltwater oysters that typically produce one pearl at a time, a single freshwater mussel can yield dozens of pearls per harvest cycle. This makes freshwater pearls the most abundant and accessible pearl type. They appear in a wide range of natural pastel colors — purple, pink, peach, and orange — though many are chemically treated or dyed to resemble saltwater varieties.
- Size range: 2–15mm (most common: 6–10mm)
- Shape: round, oval, button, baroque, coin
- Natural colors: white, pink, peach, purple, orange
- Most affordable pearl type due to high yield per harvest
- Often treated or dyed — ask about origin and treatment
Pearl type comparison.
| Akoya | South Sea | Tahitian | Freshwater | |
|---|---|---|---|---|
| Origin | Japan, China, Korea | Australia, Indonesia, Philippines | French Polynesia | China |
| Water | Saltwater | Saltwater | Saltwater | Freshwater |
| Size | 2–10mm | 8–20mm | 8–16mm | 2–15mm |
| Colors | White, silver, pink, rose | White, cream, gold | Gray, green, blue, peacock, black | White, pink, peach, purple |
| Shape | Round, near-round | Round, oval, drop, baroque | Round, drop, circle, baroque | Round, oval, button, baroque |
| Luster | Highest (mirror-sharp) | Soft, satiny | Metallic, high | Varies widely |
| Price | Mid–high | High–very high | Mid–high | Accessible |