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.

Alexandrite is the third birthstone for those who were born in the month of June.

June’s second birthstone is the moonstone.

Pearl is unique among other gemstones for it has an organic origin which is known to come from under the sea world.

Emerald is just the perfect birthstone for those born in the month of May as it falls in the heart of Spring when flowers bloom and all things go green and colorful.

Diamond is the birthstone of April.

Bloodstone is the second birthstone for the month of March.

There are two stones associated with the month of March - Aquamarine, and Bloodstone.