Verified Transparency
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To guarantee authenticity, our top-tier pearls are accompanied by documentation from the Pearl Science Laboratory (PSL) in Japanβthe worldβs leading specialist in pearl identification and interference color analysis.
Luster (TERI)
Measures brightness and the "Aurora Effect" of light interaction.
Luster (TERI)
Measures brightness and the "Aurora Effect" of light interaction.
Body Color
Identifies the specific base hue to ensure uniformity.
Body Color
Identifies the specific base hue to ensure uniformity.
Surface Quality
Detailed mapping of cleanliness and natural birthmarks.
Surface Quality
Detailed mapping of cleanliness and natural birthmarks.
Shape Grade
Verifies the exact roundness and symmetry of each pearl.
Shape Grade
Verifies the exact roundness and symmetry of each pearl.
Precise Size
Exact millimeter measurements for consistency.
Precise Size
Exact millimeter measurements for consistency.
Nacre Thickness
X-ray tested to confirm layer integrity and long-term durability.
Nacre Thickness
X-ray tested to confirm layer integrity and long-term durability.
PSL Report Types
| Report code | What it typically emphasizes |
|---|---|
| SP | Issued for top-tier selections; includes TERI analysis + aurora image |
| SS | βBest Qualityβ style reports; may include X-ray nacre thickness |
| SQ | Premium series within Best TERI category |
| SK | Best TERI + full 5-element quality analysis (incl. nacre thickness) |
| SJ | Best TERI with TERI-focused analysis |
PSL Special DesignationsΒ
01 Akoya β Best Quality
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Aurora Ten-nyo
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Aurora Hanadama
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Aurora Madama
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Aurora Akoya Queen
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Aurora Sairinshu
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Aurora Saiunda-ma
| Designation (EN) | JP/CH | Certificate | Notes |
|---|---|---|---|
| Aurora Ten-nyo | 倩ε₯³ | SP | Top tier within Aurora Hanadamaβs TERI selection. Under evaluation instruments, three interference colors coexistβtypically pink, blue-green, and whiteβwith stronger color density (a more vivid βauroraβ effect). |
| Aurora Hanadama | θ±η | SS | Highest-quality white-series Akoya; PSL defines it with standards including 6.0mm+, nacre 0.4mm+, and TERI checked for both brilliance + interference color. |
| Aurora Madama | ηε€ιΊ» | SS | Highest-quality silver-blue-series Akoya. |
| Aurora Akoya Queen | ηε | SS | Highest-quality Akoya in other body-color categories. |
| Aurora Sairinshu | 彩εη | SS | Top standard, white-series Akoya under 6mm. |
| Aurora Saiunda-ma | 彩ι²η | SS | Top standard, blue-series Akoya under 6mm. |
02 Akoya β Best TRRI & Premium Series
SK / SJ
Aurora RosΓ©
SK / SJ
Aurora Blue RosΓ©
SQ
Aurora RosΓ© Premium
SQ
Aurora Blue RosΓ© Premium
03 White South Sea β Best Quality & Best TERI
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Aurora Venus
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Aurora Chakin
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Aurora White South Sea Queen
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Aurora Phoenix
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Aurora Moon Rainbow
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Aurora Stardust
AβAAAA Pearl Grading Scale
01 Akoya Pearls
| Grade | "Information" (their wording) | Surface cleanliness | Luster | Nacre | Shape |
|---|---|---|---|---|---|
| Hanadama | Highest 1% ("Gem Quality") | 99%+ clean | Superior | Very thick | Perfectly round; accompanied by a numbered PSL certificate |
| AAA | Top 1β5% | β₯95% clean | Very high | Very thick | Perfectly round |
| AA+ | Top 5β10% | β₯90% clean | High | Thick | Perfectly round |
| AA | Top 60% (not sold by them) | 70β80% clean | Medium | Medium | Round |
| A | Bottom 50% (not sold by them) | β€50% clean | Poor | Thin | Round / off round |
02 South Sea Pearls and Tahitian Peals
| Grade | Surface description | Luster |
|---|---|---|
| AAAA | β₯95% flawless; ~5% concentrated imperfections | Very high |
| AAA | ~80β85% flawless; remaining 15β20% minor; 1β2 deep imperfections | High |
| AA | ~40% flawless; remaining has minor imperfections; ~10% deep flaws | Medium |
| A | Flaws on β₯60% of surface; ~20% deep imperfections | Poor |
