There are no known locations in Oregon where raw diamonds are commonly found. Most natural diamond sources in the United States are concentrated in states like Arkansas and Colorado. Oregon is not known for significant diamond deposits.
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.
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.
Diamonds are found on every continent on earth except Europe and Antarctica.
The Cullinan and Excelsior Diamonds were found in South Africa.
Real diamonds can be found in Arkansas.