A certification issued by Ms. Yue costs around NT $ 1,000 or US $ 28, and NT $ 1,600 or US $ 44 for a diamond over 7 carats. It takes at least half an hour to assess a piece of ordinary jewelry.
余玉雲簽發的鑑定證書，普通在新台幣一千元左右，其中證書費三百元，鑑定費七百元。鑽石、寶石依重量計價，一般而言，七克拉的鑽石，開一張鑑定證書，費用是一千六百元。