Zirconia is an artificial crystal synthetic material, while zircon is a natural ornament. They are two completely different substances. Zirconia is an oxide of zirconium, a synthetic material. The solid substance is white, odorless, tasteless and soluble in alkali and acid. Zir

?????? — ????????? ???????, ????????? ?? ?????? ???????? ? ????????? ??????. ?? ??? ??????? ???????. ?? ???? ???????????? ?? ?????????? ????????. ????????, ???????, ????????? ?? ???????, ???????, ? ???????, ????????? ?? ??????, ???????? ??? ????????, ???????. ?????