SAPPHIRE RING
1. Answer the questions:
a. Who did the title ring belong to originally?
b. What does the ring consist of?
c. Why is sapphire used as a window in high pressure vessels?
d. Give examples of transition metals.
e. What is white gold?
f. What are carats?
g. What will happen to the diamond, gold, and sapphire when you throw them into liquid oxygen?
h. What engagement ring did the professor give his wife?
2. Fill the gaps:
a. Sapphire is an _ _ _ _ _ of _ _ _ _ _ _ _ _ .
b. Aluminium oxide is _ _ _ _ _ _ _ _ _ _ .
c. Natural sapphire has metals _ _ _ _ _ _ _ _ _ in it.
d. If you _ _ _ _ _ _ _ _ chromium into aluminium oxide you get a red colour; it's called _ _ _ _ .
e. If you _ _ _ _ _ _ _ _ iron or some other elements you get this very nice blue or sometimes _ _ _ _ _ _ _ _ colour.
f. You can make synthetic sapphire, but it's not so _ _ _ _ _ _ _ _ .
g. The cheapest form of white gold uses _ _ _ _ _ _, but then , increasingly expensively, you can use _ _ _ _ _ _ _ _ _, or _ _ _ _ _ _ _ _ .
h. Diamond is a _ _ _ _ _ _ _ form of _ _ _ _ _ _ .
i. Diamond is absolutely _ _ _ _ _ like _ _ _ _ _ .