The Precinct The architectural brief involved repurposing the existing industrial buildings , which includes the conversion of Block 1 , The Diamond , into apartments , Block 2 , The Ruby , into a commercial building and Block 4 , The Amber , has been converted into a retail block . Block 5 , The Sapphire , has been upgraded and remains the main commercial building in the precinct . Block 3 , a commercial building , received minor refurbishments and will form part of a second phase along with the redevelopment of The Amber . Block 6 , The Onyx , previously an empty city block used as a parking lot , now houses a 13-storey residential building that stands as the flagship building of the Jewel City precinct .
The existing buildings were not substantially altered externally , although their façades were refurbished and adorned with local artwork . Particularly in the residential conversion ( The Diamond ), the central shafts have been enlarged through punching additional openings into the
30 Jewel City