'Pure' in the Bible

These are those who had not defiled themselves with women: they are as pure as virgins. They follow the Lamb wherever He goes. They have been redeemed from among men, as firstfruits to God and to the Lamb.

and there came out of the sanctuary the seven angels who were bringing the seven plagues. The angels were clad in pure, bright linen, and had girdles of gold across their breasts.

And the twelve gates were twelve pearls; each of them consisting of a single pearl. And the main street of the city was made of pure gold, resembling transparent glass.