There is a scale on which gemstone is judged and valued and one important characteristic is its durability because a natural gemstone lasts quite a long time. Durability is defined by more factors which we shall be shedding a light on further ahead. You can source information about gemstones on the internet and even find websites that sell it but we will now come back to the main topic of durability of gemstones as it determines the value of all sorts of stones.
Hardness is one factor of durability which accounts to any gemstone lasting for a long time. A gemstone can said to have the perfect hardness if it is not affected by any kind of scratching or abrasion. Diamonds are said to be hardest stone which is why they do not get scratched at all and sapphires and emeralds are less hard than diamonds.
Many people confuse hardness and toughness but they are two separate factors. Toughness refers to the inability of the stone to crack, chip or break. People have this misconception that diamonds are the toughest stone on the planet and cannot break no matter what device or how much force one uses but that is not true. Diamonds can break, chip and crack if they are hit in the right direction. There are some stones that are tougher than diamond but than their hardness might be lesser than diamonds.
Stability of a stone determines how well a gemstone can endure heat, chemicals and sunlight. You might not believe it but sunlight can actually cause some gemstones to lose their color over time. There are some gemstones that get damaged if they are exposed to severe heat or chemicals that are harmful for their composition.