Did you know there’s a gemstone rarer than diamonds, yet far more affordable than sapphires? What if we told you that one of the world’s most captivating gemstones was only discovered in 1967?
Tanzanite: A Rising Star in Fine Jewellery
Compared to many other gemstones, Tanzanite has a short history—it was only discovered in 1967. Yet, in just a few decades, it has captivated jewellery lovers worldwide.
This striking blue-violet gemstone was first found in Tanzania, and it didn’t take long for the world to take notice. By 1969, Tiffany & Co., one of the most renowned jewellery brands, recognised its potential and named it "Tanzanite," introducing it to the global market.
Tanzanite gained even more fame in 1997 when it was featured in the blockbuster film Titanic. The heart-shaped blue gemstone known as the "Heart of the Ocean" worn by the lead actress was inspired by Tanzanite. Since then, its popularity has soared, making it a true gem in the world of fine jewellery.
Tanzanite’s Unique Blue-Violet Colour
What makes Tanzanite so special is its mesmerising colour. It showcases a deep, vibrant blue with hints of violet. This striking hue is often compared to the finest blue sapphires, particularly the rare Kashmir cornflower blue sapphires.
Additionally, Tanzanite is pleochroic, meaning it displays different shades depending on the viewing angle—ranging from sapphire blue to violet and even burgundy under certain lighting conditions.
Exceptional Clarity in Tanzanite
Most Tanzanites have high transparency, making them appear pure and luminous. Some even describe them as having the same captivating beauty as the legendary Hollywood actress Elizabeth Taylor’s eyes.
Tanzanite’s Brilliance and Fire
Tanzanite has an impressive refractive index of 1.70 and a dispersion value of 0.021, which gives it a strong brilliance and fire. When viewed under light, its dazzling blue-violet glow almost seems alive, as if the gem itself is gazing back at you.
The Science of Tanzanite’s Beauty
Tanzanite’s chemical formula is Ca₂Al₃(SiO₄)₃(OH). Its stunning blue-violet colour is caused by trace elements such as vanadium (V), chromium (Cr), and manganese (Mn). Heat treatment is commonly used to enhance the richness of its blue tones.
Is Tanzanite Durable for Jewellery?
With a Mohs hardness of 6 to 7, Tanzanite is softer than many other gemstones. However, it has good toughness, making it easy to cut, polish, and shape into exquisite jewellery. Protective settings, such as bezels, can help maintain its longevity.
Tanzanite and Heat: What You Should Know
Tanzanite has a high melting point and remains stable under normal conditions. However, it is sensitive to sudden temperature changes. Exposure to high heat can cause fractures, so it is best to keep Tanzanite jewellery away from direct sunlight or high temperatures.
How to Preserve Tanzanite’s Radiance
Tanzanite is naturally resistant to corrosion, meaning it does not oxidise or degrade easily. However, many Tanzanites undergo treatment, such as resin filling, to enhance their clarity. These treatments can reduce durability, making the stone more vulnerable to chemicals.
To preserve its beauty, avoid exposing Tanzanite to substances like soap, detergents, sweat, perfume, or kitchen grease, as these may weaken its structure over time.
Why Tanzanite Is Perfect for Statement Pieces
Unlike many rare gemstones, Tanzanite is often found in large crystal formations, allowing for impressive cuts and statement jewellery pieces. The famous Heart of the Ocean gemstone in Titanic was based on a Tanzanite stone estimated to be around 50 carats—a size that Western jewellery enthusiasts admire.
Tanzanite: Luxury Without the Price Tag
One of the reasons Tanzanite has gained such a strong following is its price. While it resembles high-quality blue sapphires, Tanzanite is significantly more affordable. This makes it an excellent choice for those who want a striking blue gemstone without the premium price tag.
Tanzanite’s Symbolism: Balance, Harmony & Stability
At Minerva Jewelry, Tanzanite represents more than beauty—it embodies balance, harmony, and stability. This exquisite gemstone reminds us to seek equilibrium in all aspects of life, from emotional well-being to personal growth.
“Embrace the balance within, radiate harmony, and step forward with unwavering stability.”
