Submitted by admin on Fri, 04/18/2014 - 08:24
definition:
A transparent precious stone, typically blue, which is a variety of corundum (aluminium oxide)
sentence:
Most of them were common gems - rubies, diamonds, onyxes, sapphires, emeralds, topazes, and so on, and were used to supplement Elements and Talents.
difficulty:
hard
toefl frequency:
1
toefl classification: