Sydney's cracked Opal Tower sound: reportAn independent investigation into Sydney's cracked Opal Tower has found numerous factors could have caused the cracking. Source: AAP1 min readPublished 15 January 2019 2:31pmUpdated 15 January 2019 2:35pmBy Ali BahnasawySource: SBSAvailable in other languagesSkip to article contentShare this with family and friendsCopy linkShareRead more here via SBS. Share