Most often it would be obsidian.
Where would you expect to find most of the people of North Africa living
Diamond is the hardest substance known to man, so it can break most materials. Obsidian is a type of volcanic glass that is very sharp and brittle. Diamond can break obsidian.
Obsidian can be found in countries such as Mexico, the United States, Japan, Turkey, Greece, Armenia, Italy, Scotland, and Ethiopia. It is also present in various regions of continents like North America, South America, Europe, and Africa.
Obsidian.
Because when you take chips off it, it becomes sharp. You could chip little bits off until it's the right shape, then the edges would be sharp. Many other rocks do this, and many other rocks were used. Obsidian is the most fragile of the bunch, just it's also the sharpest. In fact, properly sharpened obsidian is sharper than steel can be.
If you read the story... YOU WOULD KNOW!
Many people would like to get a fox, including myself, but the legal and financial needs involved with getting a fox are out of most people's reach. In the end, most people find that it is just not worth it.
That would depend on whether or not you find her attractive. Regardless, it is probably not "normal" as in what most people do, but do you have to do what most people do?
One word for this is obsidian. Obsidian is a gorgeous hard stone, usually but not always black, and sometimes with iridescent, almost opalescent highlights. Tachylite is also a volcanic glass of basaltic composition.
Most people would look for them but if you cant find them then buy new ones.
Granite, Basalt, Gabbro, and Obsidian