Overtone is the secondary color visible on a pearl's surface, layered over the base body color. It is what gives pearls their depth and uniqueness — flat-color pearls look generic, while overtoned pearls have personality.

What is overtone?

Overtone is created by light refracting through the upper nacre layers. Different pigments and structural elements in the nacre produce different overtone colors. Higher-quality pearls have more pronounced and distinctive overtones.

Common overtones by pearl type

Akoya (white base)

• Pink / Rose — most prized; soft pink-rose shift over white
• Silver — cool silver-blue shift; rare
• Cream — warm yellow undertone

Tahitian (dark base)

• Peacock — green-with-purple shift; signature color
• Aubergine — deep purple over dark base
• Silver-blue — metallic blue-gray; rare premium
• Green — bottle-green tint
• Cherry — reddish-pink (very rare)

South Sea (white or golden base)

• White base: pink overtone, silver overtone, cream
• Golden base: champagne, light gold, deep gold, 24K

Freshwater

• White base: pink, lavender, peach (natural)
• Pink base: cherry, deep rose

Overtone and value

Distinct, vivid overtones command premium pricing:

• Tahitian peacock and silver-blue: 20-40% premium over uniform-dark Tahitian
• Akoya rose-pink overtone: 15-30% premium over plain white
• South Sea pink overtone: 10-20% premium over uniform white
• Golden South Sea deep gold/24K: 30-50% premium over light champagne

How to identify overtones

1. Hold the pearl 6 inches from a window or bright light source
2. Slowly rotate the pearl
3. Watch for color shifts — these are the overtones
4. Distinct overtones (peacock, aubergine) are obvious
5. Subtle overtones (rose, silver) require more careful inspection

Multiple overtones

Some pearls have multiple overtones — e.g., peacock-aubergine, cherry-pink, or silver-blue. These multi-overtone pearls are particularly prized in high-end jewelry. The most-coveted Tahitian pearls combine peacock with hints of aubergine — sometimes called "rainbow peacock."

Overtone vs body color

Body color = the underlying color of the pearl (white, gold, dark gray)
Overtone = the secondary shift visible over the body color (pink, silver, peacock, etc.)
Orient = the iridescent rainbow effect across the entire surface (rare and premium)

Browse by overtone

• Tahitian (peacock, aubergine, silver-blue overtones)
• Akoya (rose, silver overtones)
• White South Sea (pink, silver overtones)

Frequently asked questions

What is the difference between pearl color and overtone?

Color is the base body color (white, dark gray, gold). Overtone is the secondary color visible as light reflects off the surface. A pearl can have a white body with pink overtone, or dark body with peacock overtone.

Are overtoned pearls more valuable?

Yes, generally. Distinct vivid overtones command 15-50% premium over flat-color pearls of the same type. The most prized: Tahitian peacock, Akoya rose, golden South Sea deep gold.

How do I see pearl overtones?

Rotate the pearl under a window or bright light source. Distinct overtones show clear color shifts. Subtle overtones (rose, silver) require careful inspection at the right angle.

What is "orient" in pearls?

Orient is a rainbow-like iridescent effect across the entire surface — rarer than overtone, and even more valuable. Some Tahitian and South Sea pearls show orient in addition to overtone.

Can overtones be artificial?

Some treatments (bleaching, irradiation) can enhance overtones in lower-grade pearls. Reputable sellers disclose treatments. Natural-overtone pearls show consistent color shifts; treated pearls often have flatter or unnatural overtones.