Christianity
Crystals certainly are beautiful objects, for they were created by God. Portions of God's glorious heavenly city, the New Jerusalem, will be constructed from crystal.
It's in the Bible, Revelation 21:11, & 18-20 NIV. "It shone with the glory of God, and its brilliance was like that of a very precious jewel, like a jasper, clear as crystal. The wall was made of jasper, and the city of pure gold, as pure as glass. The foundations of the city walls were decorated with every kind of precious stone.
The first foundation was
jasper, the second
sapphire, the third
chalcedony, the fourth
emerald, the fifth
sardonyx, the sixth
carnelian, the seventh
chrysolite, the eighth
beryl, the ninth
topaz, the tenth
chrysoprase, the eleventh
jacinth, and the twelfth
amethyst. "