"They're very difficult to cut because they're the very hardest.

This somewhat rosy stone is also a diamond, as is this green one that many take for an emerald.

Quiroga the Chinaman offered me six thousand pesos for it in order to present it to a very influential lady, and yet it is not the green ones that are the most valuable, but these blue ones." He selected three stones of no great size, but thick and well-cut, of a delicate azure tint.
"For all that they are smaller than the green," he continued, "they cost twice as much.

Look at this one, the smallest of all, weighing not more than two carats, which cost me twenty thousand pesos and which I won't sell for less than thirty.

I had to make a special trip to buy it.