証書系列 Certified Collection
本店亦出售頂級品質之證書貨品，包括：
「真珠科學研究所」之權威珍珠鑑定證書，認受性最高，最廣為人所認識包括極光天女，極光真多麻及極光維納斯等級。
「真珠綜合研究所」所發出之證書，包括雪白珠等級。
另外，亦有鑽石及寶石之證書，日本「Gem Grading System」及「Diamond Pro Service」，國際性的「Gemological International Laboratories」。
PT Pearls also sells top-quality certificated products, including:
One of the most recognizable pearl identification certificate by "Pearl Science Laboratory" (真珠科學研究所) which set up the most well-known gradings such as the Aurora Tennyo, Aurora Madama, and Aurora Venus.
The certificate issued by the "Pearl Institute Co., Ltd." includes the grade of Snow White Pearl.
The certificates for diamonds and gemstones by the Japanese "Gem Grading System" and "Diamond Pro Service", and the international certificates by "Gemological International Laboratories".
