The 38-year-old British fashion designer also lost a $1,900 (GBP1,000) necklace in the robbery at her $5.7 million (GBP3 million) mansion - both gifts from former spouse Law.
The couple, who were married in 1997 and have three children together - RAFFERTY, IRIS and RUDY - divorced in 2003.
A source says, "Sadie is very upset. The jewellery was obviously worth a lot of money but it is the sentimental value which is more important.
"She no longer wore the engagement ring but had been keeping it to pass on her children.
"Sadie can't understand how the rings went missing. There was no sign of a break-in."
A police spokesman adds, "It is alleged two items of jewellery have been stolen. Our inquiries continue."27/03/2005 14:04