John's vision of the New Jerusalem includes its radiance—'having the glory of God, its radiance like a most rare jewel, like jasper, clear as crystal' (Revelation 21:11). The participle describes the quality of being transparent and brilliant like crystal. Ancient crystals, including clear quartz, represented perfect clarity and purity. The verb conveys the process of crystallization—becoming perfectly clear and luminous. The holy city possesses supernatural brightness, reflecting God's own glory.