Laboratory
Hardness
Now let’s concentrate on hardness, one of the most important properties.
You can find how to test hardness with this printable class worksheet, ‘How to test hardness’
The hardest mineral on Earth is diamond, rated 10. That’s probably why they say Diamonds Are Forever.
As Bond’s old mate Q would say, that’s enough messing about. Now it’s time to get down to some hard work.