Where does “κρύσταλλο” come from?

κρύσταλλο (Greek) comes from Byzantine Greek κρύσταλλον, from Ancient Greek κρύσταλλος, from Ancient Greek κρύος, from Proto-Indo-European krews- — to form a crust, begin to freeze.

κρύσταλλο (Greek): mineral crystal, crystal glass, ice;...

Definitions

mineral crystal, crystal glass, ice;...

Ancestry of “κρύσταλλο”, step by step

Step	Language	Word	Meaning
1	Byzantine Greek	κρύσταλλον	—
2	Ancient Greek	κρύσταλλος	ice; rock crystal
3	Ancient Greek	κρύος	cold, chilliness; frost; ice
4	Proto-Indo-European	krews-	to form a crust, begin to freeze

Every word from Proto-Indo-European krews- →Every word from Ancient Greek κρύος →Every word from Ancient Greek κρύσταλλος →