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Topaz can be used as an abrasive material， but also for the instrument bearings. Transparent and beautiful topaz are precious gems. Topaz is a charming colors， beautiful and cheap mid-precious stones， loved by the people. Internationally， many countries set Topaz as "November birthstone，" is a symbol of friendship， friendship and fraternity.

Brave is an auspicious animal to treasure for food， being placed in the family home， may Lucky Cai， town house defends evil.