Diamonds are not found in a great many different places. Diamonds are not found floating in the ocean for example.
No, no natural diamonds are found in New Zealand.
Diamonds are commonly found in volcanic pipes.
Ancient Egyptians may not have 'cut' their diamonds in the same way that diamonds are 'cut' today. The natural occurrence of a diamond can be a pyramid shape, and even two pyramids fused together at the base. In this incarnation, a diamond is quite beautiful and eye-catching.
Probably, although not diamonds as we know them today. Today's popularity and valuation of diamonds begin in earnest the 19th century with improvements in the art of planning and cutting raw diamonds into today's gemstones. You can read more about Egyptians' adornment, below. You can also read more about the history of today's gemstones, below.
Diamonds are found below level 16 of the world.
The diamonds themselves are, well, diamonds. They're found mixed in with other rock, though.
Coal and diamonds are both forms of carbon.
Diamonds are found on every continent except Antarctica and Europe - so yes, diamonds are found in India.
Diamonds are continuously being found around the world, so there is no specific "last time" that they were found. The mining of diamonds happens on an ongoing basis in various countries where they are naturally occurring.
iron was found by Egyptians and they used it a lot.
Diamonds are found on every continent on earth except Europe and Antarctica.