HEBEI YUNMAO IMPORT&EXPORT GROUP CO., LTD
(THE PEOPLE’S REPUBLIC OF CHINA)

GARAM ELECTRONICS CORP. (KOREA)

IMPEX HIGH-TECH HmbH (GERMANY)

RUSGEMS CO. LTD.

Quarzchmelze Ilmenau GmbH

KRYSTALY, Hradec Kralove, a.s (CZECH REPUBIC)