Meaning of HARD MASS in English

HARD MASS

1. Jewelry. a hard glass used for imitating gemstones.

2. (not in technical use)

a. any glass for imitating gemstones, esp. emerald.

b. any of certain synthetic gemstones.

Also, hard masse .

Random House Webster's Unabridged English dictionary.      Полный английский словарь Вебстер - Random House .