Rev 21:11

11 having the glory of God. Her light was like a most precious stone, as if it was a jasper stone, clear as crystal; 

having the glory of God – this is the Church. It is the Spirit of Christ as the body of Christ, see Isa 6:3, John 1:14.

crystal clear Jasper – a red colour, and the clearness must signify the washing of the Church by the blood of Christ.