Riddles

1. Pronounced as one letter,
And written with three,
Two letters there are,
And two only in me.
I'm double, I'm single,
I'm black, blue, and gray,
I'm read from both ends,
And the same either way.
What am I?

2. What comes once in a minute, twice in a moment, but never in a thousand years?

3. I am a box that holds keys without locks, yet they can unlock your soul. What am I?

4. He starts and ends 2 common English words. One painful in love, one painful in everyday matter. Do you know what 2 words I must be?

5. I am an insect, and the first half of my name reveals another insect. Some famous musicians had a name similar to mine. What am I?

6. If you have it, you want to share it. If you share it, you don't have it. What is
it?