Sam Kean

The price of diamonds can vary greatly depending on size, cut, color, and other factors, including whether they have a history. But because of the rarity of blue boron diamonds, they often fetch more money than gems of similar quality.

I did some research once on the way people in the past imagined the year 2000. They tended to picture the things they already had getting more sophisticated - flying cars, self-cleaning windows. And the folks in the early 1900s had a wildly optimistic estimate of the future of pneumatic tubes.

An independent state does not pay too dear a price for its independence in accepting the sufferings of war when it cannot avoid them; a state which has lost its independence may find at least some compensation in the fact that its protector procures for it peace with its neighbours.