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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.

20 Bewertungen
  • user-42e528e0acbc
    Positiv
    •Vor 2 Tagen

    All perfect, very good communication and had even an extra detail on the shipment. Thank you.

  • user-5ac0b30ed49a
    Positiv
    •Vor 2 Wochen

    Sono felicissima! Ottimo venditore, il diamante è stupendo, la spedizione molto veloce. Grazie ancora 🔝🔝🔝

  • user-99b8627
    Positiv
    •Vor 4 Wochen

    Very fair trader, I recommend it to everyone! Thank you very much Jasmin! 🙂

  • user-739e567e9faf
    Positiv
    •Vor 6 Wochen

    Beautiful

  • user-8f608859acbf
    Positiv
    •Vor 13 Wochen

    Amazing job packing. And the process 💯 the best buying here all the time

  • user-0db3348d2a3a
    Positiv
    •Vor 14 Wochen

    Jasmin from OST was super friendly and available. Competitive pricing with super fast and safe shipping. Will buy again

  • user-76e4d4b085cb
    Positiv
    •Vor 17 Wochen

    Absolutelly great and trustful seller. Makes kind contact with you to make sure that everything about your shipment is going well and safely. I'm a happy buyer and definitely will order on OST again!

  • user-76e4d4b085cb
    Positiv
    •Vor 17 Wochen

    Absolutelly great and trustful seller! Makes kind contact with you to make sure that everything about your shipment is going well and safely. I'm a happy buyer and definitely will order again on OST!

  • user-c51174d74e6e
    Positiv
    •Vor 18 Wochen

    Excellent seller

  • user-240371423ec4
    Positiv
    •Vor 19 Wochen

    Super blij mee. Lange weg afgelegd, maar de moeite waard. EXTREEM goed verpakt!!! Bedankt. En ook BEDANKT voor de extra"s verassingen....Heel Attent!