1 pcs 鑽石 (天然) - 0.54 ct - 圓形 - E(近乎完全無色) - VS2 - 美國寶石學院（Gemological Institute of America (GIA)）
開拍價
1 pcs 鑽石 (天然) - 0.44 ct - 圓形 - E(近乎完全無色) - VS1 - 美國寶石學院（Gemological Institute of America (GIA)）
開拍價
At OST, we are proud diamond manufacturers with a legacy rooted in excellence and craftsmanship. We specialize in natural diamonds, offering fancy shapes and rare, one-of-a-kind stones that are ethically sourced, cut, and polished entirely in-house. While we also craft fine jewelry, our true expertise lies in diamond manufacturing. Every diamond reflects our dedication to brilliance, quality, and responsible sourcing—backed by generations of experience. To ensure trust and transparency, we offer diamonds certified by globally recognized institutions such as the GIA (Gemological Institute of America) and IGI (International Gemological Institute), providing our clients with assurance of authenticity, grading accuracy, and value.