OST
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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.
- user-2e2432a8f695Positiv•Vor 2 Tagen
Got my parcel. Everything is OK. It was delay in delivery due to wrong telephone number on the parcel. Thanks seller for his gift. It's so nice.
- user-267ed706acefPositiv•Vor 1 Woche
Fast delivery, everything as ordered. Very satisfied. 👍
- user-267ed706acefPositiv•Vor 1 Woche
Super!
- user-9b1de90cbb1ePositiv•Vor 4 Wochen
Excellent je recommande
- user-e8bf0cf188dcNeutral•Vor 5 Wochen
Ist ok. in Antwerpen bekomme ich die gleiche Qualität und günstiger
- user-42e528e0acbcPositiv•Vor 6 Wochen
All perfect, very good communication and had even an extra detail on the shipment. Thank you.
- user-5ac0b30ed49aPositiv•Vor 8 Wochen
Sono felicissima! Ottimo venditore, il diamante è stupendo, la spedizione molto veloce. Grazie ancora 🔝🔝🔝
- user-99b8627Positiv•Vor 10 Wochen
Very fair trader, I recommend it to everyone! Thank you very much Jasmin! 🙂
- user-739e567e9fafPositiv•Vor 12 Wochen
Beautiful
- user-8f608859acbfPositiv•Vor 18 Wochen
Amazing job packing. And the process 💯 the best buying here all the time