Trivia....Anyone?

Today's trivia comes from Jeopardy! The topic is gems and jewels. First correct set of answers wins champ. Answers are posted tomorrow.

1."Ring" in if you know that this gem is the hardest substance found in nature

2.This gem is most prized when its color is pigeon's blood red

3.Folklore affirms that spheres made from this precious stone, ojo de tigre, help in attaining business success

4.This 2-word gemstone was once ground to produce ultramarine, a deep blue paint pigment

5.Citrine, a translucent yellow quartz, is often sold as this gem

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