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Tanzanite Exploration: A 500 Million Year Old Miracle Stone

Dec 14,2023 | Juyoyo

On the canvas of nature, there is a miraculous stone sculpted by the ages that shimmers with a dreamlike blue-violet light. This mesmerizing gemstone is Tanzanite, which, despite its short history compared to the earth's long years, contains a deep mystery that captivates the mind.

In this article, we'll dig deeper into the origins of Tanzanite, demystifying its chemical makeup and physical properties, as well as its mysterious footprint in geological history. We will also explore Tanzanite's place in the jewelry industry and why it has become one of the top choices for wedding bands and engagement rings. Get ready for a journey of discovery that will reveal the mysteries of Tanzanite, a 585 million year old wonder stone.


Origin of Tanzanite

Discovery Sites and Deposits

The mysterious story of Tanzanite begins in the Meru mining region of northern Tanzania, a land thickly covered by nature that hides a precious gift. During a chance discovery in 1967, local Maasai herders noticed a blue-violet glow at the foot of Mount Meru. This was the beginning of the discovery of Tanzanite, the first appearance of a gift to the depths of the earth.

Tanzanite is mainly produced in the Miranjani Hill and Merelani Hills in the Meru Mining District, where the geological conditions provide an ideal environment for the formation of Tanzanite. These areas have undergone complex and lengthy geological processes deep within the earth's crust, creating a unique environment suitable for Tanzanite production.

Process of Formation

The formation of Tanzanite involves hydrothermal activity and mineral metamorphism processes deep within the Earth. According to geologists, the creation of Tanzanite began between 500 and 600 million years ago, a time of dramatic transformation on Earth. The unique crystallization of Tanzanite began when magma from deep within the Earth's crust interacted with surrounding minerals at high temperatures and pressures.

This process requires extremely specific geological conditions, including a unique combination of temperature, pressure, and mineral composition, and Tanzanite is so rare precisely because these conditions are difficult to replicate elsewhere on Earth.

The Source of Tanzanite's Distinctive Blue-Violet Hue

Tanzanite's unique beauty also lies in its blue-violet hue, which comes from the iron in it. When the stone is subjected to geological pressure and temperature, the oxidized state of the iron changes, giving it different shades ranging from blue to purple. This makes each Tanzanite unique, like a natural work of art, capturing the memory of long years deep within the earth.


Chemical Composition and Physical Properties of Tanzanite

rew TanzaniteChemical Composition

Composition: Tanzanite is a rare calcium aluminum hydroxy silicate (Ca₂Al₃(SiO₄)₃(OH)). It is unique in that it contains trace amounts of iron (Fe2+ and Fe3+), the presence of which leads to energy level jumps of electrons, which gives Tanzanite a fascinating color variation, transitioning from deep blue to purple.

Physical Property

Hardness: With a Mohs hardness of 6 to 7, Tanzanite is relatively hard and suitable for all kinds of jewelry making, especially rings and other frequently worn jewelry, but still avoid rough wear and strong impact.

Refractive index: Tanzanite has a refractive index between 1.690 and 1.700, which allows it to be cut with a striking refractive effect that adds a unique brilliance to the stone.

Density: Tanzanite has a density of approximately 3.35g/cm 3, which gives it a moderate sense of weight in the hand and enhances its regal quality to the touch. This allows one to feel a unique sense of substance when wearing Tanzanite jewelry, which adds to the gemstone's appeal.

Birefringence: With a birefringence of 0.008~0.013, Tanzanite is able to disperse incident light and produce brilliant optical effects.This birefringent effect gives Tanzanite an excellent performance in terms of transparency and optical brightness, adding to its visual appearance.

Cracks and inclusions: Some cracks and inclusions may be present in Tanzanite, these natural features are natural traces of its formation process.


Tanzanite in the Jewelry Industry

Tanzanite, the miracle stone from the land of Tanzania, is not only highly regarded for its unique origins and mysterious beauty, but also as one of the stars of the gemstone world due to its unique position in the jewelry industry.

Preferred Wedding and Engagement Rings

UNIQUE HUE: Tanzanite is known for its rich blue-violet hue, which makes it ideal for wedding bands and engagement rings. Its deep color symbolizes deep affection and eternal love.

Personalization: Its relative rarity and unique color make Tanzanite a popular choice for personalized custom jewelry. Many people choose Tanzanite to create one-of-a-kind engagement rings that highlight their unique tastes and feelings.

Investment Value and Collecting

Preciousness: Tanzanite's small origin and limited deposits make it more precious than other gemstones. This makes owning a piece of Tanzanite jewelry not only fashionable, but also an investment.

Appreciation Potential: Due to its rarity, Tanzanite has a high potential for appreciation in the market. Buying Tanzanite jewelry is not only a display of personal taste, but also a smart financial decision.

Extraordinary Design Inspiration

Designer's Favorite: Tanzanite's unique color has attracted the attention of countless jewelry designers. The versatility of its colors allows designers to show originality and innovation, giving Tanzanite a variety of different design inspirations.

Versatile pairing: Tanzanite complements precious metals such as gold and platinum, and also forms fascinating combinations with other gemstones such as diamonds and sapphires. This makes it ideal for designers and consumers alike.

Sense of Social Responsibility

Tanzania's Natural Treasure: The excavation and processing of Tanzanite has contributed greatly to Tanzania's economy. Along with the jewelry industry, Tanzanite has become Tanzania's natural treasure, leading the development of local communities.

SUSTAINABLE MINING: In order to preserve the rarity of Tanzanite, the jewelry industry has begun to adopt sustainable mining and trading practices to ensure that this gemstone retains its mystical appeal while maintaining the balance of natural ecosystems.



Tanzanite, the miracle stone from the Tanzanian earth, shines mesmerizingly in its unique origins, deep colors, and unique place in the jewelry industry. After hundreds of millions of years, Tanzanite is not just a gemstone, but a precious work of art given to us by nature.

As we conclude this journey of discovery, we encourage you to delve deeper into the mysterious beauty of Tanzanite and explore more of its precious jewelry wonders. Whether as a beautiful gemstone or a story that carries history, Tanzanite will continue to shine in our hearts as one of nature's most magnificent gifts.