Mazal u’ Bracha has been the Hebrew expression for sealing transactions in the international diamond trade for hundreds of years – in Amsterdam until World War II, and Antwerp since then. Literally, it means “luck and blessing”. Sociologically, it means that if you default, the community of Jewish diamantaires will impose the sanction of religious law, redline your credit, and you will be unable to take goods on approval, buy, borrow, trade, or continue in the business.
by John Helmer, Moscow @bears_with