At PEARL VOGUE, authenticity stands at the heart of every creation.
Each piece is crafted from genuine pearls and gemstones, carefully sourced and—where applicable—independently verified by leading gemological institutions.
While not every jewel carries an external certificate, each has undergone in-house inspection and quality verification aligned with Japan’s highest standards.
Authenticity & Certification
PSL - Japan Pearl Science Laboratory (Japan)
Recognized worldwide as Japan’s foremost authority on pearl grading, the Japan Pearl Science Laboratory (PSL) conducts rigorous optical and structural testing to assess surface perfection, luster, nacre thickness,
and symmetry.
PSL certificates are issued only for pearls that meet its demanding optical reflection standards, ensuring authenticity and precision in every evaluation.
PEPCA — Japan Pearl Export
& Processing Cooperative Association (Japan)
PEPCA operates Japan’s national premium classification for pearls and oversees independent verification of top-grade quality.
Its certification signifies exceptional natural brilliance, purity, and craftsmanship under Japan’s strict industry standards.
GUILD — GUILD Gem Laboratories (USA)
GUILD specializes in colored gemstones and organic materials, using advanced spectroscopy and microscopy for species identification, origin assessment, and treatment disclosure.
Reports are internationally recognized for scientific rigor and
transparent notation.
GIA — Gemological Institute of America (USA)
Recognized as the world’s most respected authority in gemology, GIA establishes global grading standards for diamonds, colored stones,
and pearls.
Its certification represents the highest benchmark of accuracy and transparency in gem identification, origin determination, and quality evaluation.
GIA reports are accepted internationally by leading auction houses and luxury jewelers as definitive documentation of authenticity.
CGL — Central Gem Laboratory (Japan)
Japan’s Central Gem Laboratory (CGL) is one of Asia’s most trusted gemological authorities, renowned for its rigorous evaluation of diamonds, colored gemstones, and jade.
CGL reports emphasize precision grading, origin verification, and natural composition, and are widely recognized throughout Japan’s high jewelry industry.
At PEARL VOGUE, CGL certification is used primarily for diamond jewelry and collectible gemstone pieces crafted in Japan.
AGL — American Gemological Laboratories (USA)
Based in New York, AGL is known for meticulous origin reports and enhancement analysis for fine colored gemstones.
Its disclosure system is a gold-standard reference among collectors and high jewelry maisons.
Note: Not every piece includes a third-party certificate.
Additional verification may occasionally be provided by other internationally recognized gemological institutions, depending on gem type and origin.