Aquamarine has a hardness of around 7.5 to 8 on the Mohs scale, making it durable for jewelry.
Zircon has a hardness of around 6-7.5 on the MOHS scale.
Citrine has a hardness of 7 on the MOHS scale which indicates a good toughness quality.
Tourmaline has a hardness of 7 to 7.5 on the MOHS scale.
Sapphire has a hardness of 9 on the MOHS scale.
Peridot has a hardness of around 6.5 - 7 on the Mohs Hardness Scale making it durable enough for jewelry wear.
Ruby is relatively hard—9 on the Mohs scale.
The pearl has a hardness of 2.5 in the MOHS scale of hardness.
Turquoise is the third birthstone for December and like Zircon it is also among the oldest stones in the world.
Tanzanite is one of the three birthstones for the month of December.
Zircon is among the three birthstones of December.
Topaz is the birthstone for those born in the month of November.
This vibrant shining gemstone has been considered to be a present from the sun.
Opal is a stone that has a characteristic called play-of-color.
The month of October has two birthstones; The Tourmaline and the Opal.
The birthstone for people born in September and the gemstone related to Ruby.
Peridot is the principal gemstone for August; however, the original birthstone was Sardonyx.
Another birthstone for the month of August is the Sardonyx.
Peridot is the birthstone for those born in the month of August.
The birthstone of July, Ruby is considered to be one of the most costly gemstones.