glans is the most important grading criterion. It is what distinguishes een mooie parel from a dull one — and it is the trait that most clearly separates real parels from imitations.

Wat is parel glans?

glans is the depth and sharpness of light reflection from the parel surface. It is created by light refracting through the layered nacre — microscopic platelets of aragonite separated by conchiolin protein layers. The thicker and more uniform the nacre, the deeper the glans.

glans grades

• Excellent / Mirror — sharp, mirror-like reflection. You can see your own outline clearly in the parel. Found only in highest-grade parels (typically AAA).
• Very Good / High — bright, clear reflection but slightly less sharp. Reflections of bright objects (windows, lights) are clearly visible but slightly diffused.
• Good — visible reflection but softer; you can see object outlines but not crisp details.
• Fair — surface appears bright but reflections are blurred or diffused.
• Poor — chalky or matte appearance; reflections are unclear or absent.

The window test

Hold a parel 6 inches from a window. The window's reflection appears in the parel. The sharper the window outline you see, the higher the glans grade. Mirror glans shows the window clearly. Good glans shows it as a soft outline. Poor glans shows it as a vague glow.

glans by parel type

• Akoya (Japanse): highest spiegelglans of all parels. Cold winters slow nacre deposition, producing tighter denser layers.
• Tahitian: deep glans with ondertonen shifts; excellent reflection in AAA grade.
• South Sea: deep, soft, satin-like glans; the glow appears to come from inside the parel.
• Freshwater: variable; AAA freshwater can rival Akoya in glans, but most freshwater is "Good" grade or below.

What dulls glans

• Chemicals — perfume, hairspray, lotions, makeup all coat nacre and reduce reflection
• Body oils and sweat — accumulate over time without proper cleaning
• Improper storage — dehydration causes nacre to lose its layered structure
• Age (in low-kwaliteit parels) — thin nacre dulls over decades; thick nacre (South Sea) maintains glans for generations

Restoring glans

Mild glans loss can be restored:

1. Clean with mild soap and distilled water
2. Wipe with soft microfiber cloth
3. Apply small amount of mineral oil with cotton ball, then buff dry (rare/special pieces only)

Severe glans loss (chalky surface) cannot be restored — the nacre layers have been compromised.

Why glans matters more than maat

A 7mm Akoya AAA with spiegelglans will outshine a 12mm freshwater of "Good" grade. Buyers who prioritize visual impact should weigh glans heavily. Smaller AAA parels are nearly always more visually impressive than larger AA-or-below parels.

Browse by glans grade

• Akoya-parels (spiegelglans)
• Tahitiparels (deep glans)
• Zuidzeeparels (satin glans)

Veelgestelde vragen

Wat is the highest glans parel?

Akoya Hanadama (top 1-3% of Japanse harvest) has the highest spiegelglans of any gekweekte parels. Zuidzeeparels have a different aesthetic — deeper, more soft-glowing glans.

Waarom Akoya glans so distinctive?

Cold Japanse winters slow nacre deposition, producing tighter, denser nacre layers. The result is sharper light refraction and a mirror-like surface.

Can dull parels be restored?

Mild dullness from chemical buildup can be cleaned with mild soap and water. Severe nacre damage from chemicals or age cannot be reversed.

How is glans gegradeerd?

By visual inspection — typically by trained graders comparing parels against reference samples. Mirror = highest, then very good, good, fair, poor.

Does glans fade over time?

High-kwaliteit parels (thick nacre) maintain glans for generations with proper care. Low-kwaliteit parels (thin nacre, freshwater) can dull within years.