Christine Quinn's Home Targeted by Home Invasion Robbers

"Selling Sunset" star Christine Quinn narrowly escaped violent intruders early Friday ... and what saved them is some sturdy glass.

Christine, her husband, Christian Richards, and their son were sound asleep when they were awakened by some noise outside the house.

They apparently didn't see anything when they peered outside, but when they checked their security footage they were horrified to see 2 armed people trying to break in through a window.

What saved them from a home invasion robbery -- triple-pane glass that just wouldn't crack.

They called 911 and cops got there in minutes, but the robbers escaped.

Christine lives in the Hollywood Hills above the Sunset Strip. That area, along with others in the L.A. area, have been hit hard by crime over the last year.

Christine says the window the robbers were trying to break was 4 feet from her bedroom. She says it was the most horrifying moment of her life.