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Home articles 10 Facts About December Birthstone Tanzanite That You Want to Know

10 Facts About December Birthstone Tanzanite That You Want to Know

limz Published On Sun Dec 15 2019   Modified On Sun Dec 15 2019
10 Facts About December Birthstone Tanzanite That You Want to Know

Tanzanite is one of the three birthstones of December i.e turquoise, topaz, and tanzanite. The colors of these three stones are quite similar to each other. 

Tanzanite was only known in 1967 when Manuel d’ Souza discovered it in the Merelani Hills near Mt. Kilimanjaro in Northern Tanzania. Since its discovery, Tanzania is the only place where they are mined and manufactured.


Due to the movement of the tectonic plates and excessive heat, Mount Kilimanjaro was formed. In this process, one of the most mineral-rich places on earth "The Mozambique Orogenic Belt" was created. Researchers and others believe that during this process, Tanzanite was formed.


The color of Zanzanite varies from Blue to violet to bluish purple. The chemical composition of this stone is Ca2Al3(SiO4)3(OH) a calcium aluminum silicate and it falls among one of the 7 crystal systems, "Orthorhombic". The specific gravity of this stone is 3.35 and ranks between 6 to 7 in the Mohs scale of hardness.


Tanzanite was named after Tanzania, the only place where these stones are found. These stones were only found in 1967 making them relatively new gemstone. Since its discovery, a lot of profit has been made by the markets throughout the world.

 After the discovery of this stone, it was named "Blue Zoisite" but Tiffany & Co. changed its name to Tanzanite so that it will represent the only place where these stones are found. In 2002, the American Gem Trade Association declared it as the official birthstone of December.


The value of Tanzanite can be determined by its cut, clarity, quality, and color. Among these features, color is the most important and strong-to-vivid blue, purplish-blue and violetish blue color is more valuable than other colors. These stones with rich colors can be worth $300-$425 per carat.

Healing Properties

Tanzanite is not only known for its indescribable beauty but also its special healing properties. These stones are related to the throat chakra, crown chakra, and third-eye chakra. It guides you in the right direction and helps you to think more calmly and clearly.

These stones improve the immune system of our body, detoxifies the blood, regenerates cell tissues and improve the digestive system. These stones help you heal the wound faster, reduces stress and anxieties, increases mental power and also motivate you to avoid substance use.   


It hasn't been so long since this stone was first discovered, so there are not so many myths about this stone. One of the popular myths of this stone is that it was formed when God strikes the hills with lightning and the hill was on fire. After the fire cooled down many of the rocks turned blue forming tanzanite.

Queen of Kilimanjaro Tiara

Queen of Kilimanjaro Tiara is the world's largest faceted tanzanite which is of 242 carats. It is wrapped around by 803 tsavorite garnets and 913 brilliant-cut diamonds. Today it belongs to the first CEO of Apple Computers, Michael Scott. This stone was among the highlight of The Royal Ontario Museum (ROM).

Picture of Queen of Kilimanjaro Tiara
Picture of Queen of Kilimanjaro Tiara. 
Image Source: Flickr

The Mawenzi Tanzanite

The Mawenzi Tanzanite is the largest Tanzanite crystal in the world which weighs over 3 kg (16839 carats) and measures 220 mm x 80 mm x 70 mm. It was discovered in the year 2005 and was 270 meters underground at the company’s Bravo Shaft, the southernmost shaft of TanzaniteOne’s license area. It was named after Kilimanjaro's second-highest peak. 

Picture of the largest Tanzanite "The Mawenzi Tanzanite".
Image Source: Pinterest

Heart of the Ocean

Kate Winslet aka Rose DeWitt Bukater is the actress who played a lead role in the movie "Titanic". In the movie, she used a fictional blue pendant necklace known as "Heart of the Ocean" in the movie. It is believed that the real heart of the ocean sank with the Titanic and is somewhere deep under the sea.

Picture of Kate Winslet wearing fictional Heart of the Stone.
Image Source: Pinterest

Precious Heirlooms

As there is only one place where Tanzanite can be mined, the supply of these stones is decreasing and demands are increasing rapidly. So, these stones are considered to be precious heirlooms that are passed from generation to generation. In the upcoming years, the price may increase rapidly because of its rarity and limited supply.

Visit Stoneharu for more related with gemstones.