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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.

11 anmeldelser
  • user-76e4d4b085cb
    Positiv
    •2 uker siden

    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
    •2 uker siden

    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
    •3 uker siden

    Excellent seller

  • user-240371423ec4
    Positiv
    •4 uker siden

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

  • user-c27427fa8e1e
    Positiv
    •12 uker siden

    Είναι πολύ σωστός πολίτης ότι λέει αυτό είναι Συνεργάζεται με πάρα πολύ καλή εταιρεία Αποστόλων και είναι σωστός επαγγελματίας τα συγχαρητήρια μου

  • user-934daa1cece0
    Positiv
    •17 uker siden

    Excellent quality, fast shipping, very responsible seller, hope to have the opportunity to continue trading

  • user-c4efcc2a8630
    Positiv
    •18 uker siden

    super

  • teodor-ion
    Positiv
    •27 uker siden

    Excelent

  • user-29ca3edb227d
    Positiv
    •28 uker siden

    Sehr guter Kontakt, gut verpacktr. Steine sind ok und hübsch. Habe in 2 Auktionen gekauft.

  • user-6fee46e534db
    Positiv
    •28 uker siden

    Everyrhing was OK. Trustable. Thank you soo much for your kind help!