The vulnerable victims, some as young as 14, were exploited by a “cynical organisation” and passed between abusers, the court heard.
The 17 men and one woman were convicted of offences including conspiracy to incite prostitution, rape and drugs.
It emerged that police paid a convicted child rapist £10,000 as an informant.
Three of the gang have been jailed. The rest will be sentenced next month.
Sex exploitation scandal: How Newcastle women and girls were drugged and raped by grooming gangs
We are able to report today for the first time on the true horrifying details of Operation Sanctuary which uncovered sex exploitation in Newcastle
Vulnerable girls and young women have been sexually exploited and prostituted in parts of Newcastle in a crimewave which has brought shame on our city.
Today we can reveal how the troubled girls were lured to parties, known as “sessions”, where they were given drugs and alcohol in return for sex, while those involved cruelly took advantage of them for their own twisted ends.