Tanzanite – The World's Rarest Gemstone

May 5, 2026

Imagine there's a gemstone found in only one place on Earth – an area just 7 kilometers long at the foot of Mount Kilimanjaro in Tanzania. This stone is Tanzanite – and it is rarer than diamonds.

What makes Tanzanite so special?

Tanzanite captivates with its exceptional color depth: depending on the light, it shimmers in deep blue-violet, luminous purple, or delicate blue. This unique property is called pleochroism – the stone displays different colors depending on the viewing angle.

This makes every Tanzanite a true one-of-a-kind. No two stones are alike.

Why is Tanzanite so rare?

Tanzanite was formed approximately 585 million years ago by a geological anomaly. The combination of heat, pressure, and the unique mineral composition in this region of Tanzania is unparalleled worldwide and cannot be replicated.

Geologists estimate that the known Tanzanite deposits will be depleted in 20 to 30 years. After that, there will be no new Tanzanite.

A piece of Tanzanite jewelry is therefore not only beautiful – it is an investment in something that will become increasingly valuable over time.

Tanzanite in the world of jewelry

Tanzanite was only discovered in 1967 – a young gemstone, therefore, compared to rubies or emeralds, which have been known for millennia. It was Tiffany & Co. that made Tanzanite world-famous and gave it its name – in honor of its country of origin, Tanzania.

Today, Tanzanite is one of the most coveted gemstones of all and adorns the collections of the most renowned jewelers worldwide.

How to choose a good Tanzanite?

When choosing Tanzanite, four factors are considered:

Color – The most valuable stones show a rich blue-violet. Too light or too gray tones are less desirable.

Clarity – High-quality Tanzanites are eye-clean, meaning they have no visible inclusions.

Cut – A good cut optimally showcases the stone's play of color.

Carat – Larger Tanzanites are disproportionately more valuable, as they are rare.

At Gallardos-Design, Victor and Elias Gallardo personally select each Tanzanite – directly from trusted dealers who guarantee fair and ethical trade practices.

Caring for Tanzanite – how to keep it beautiful

With a Mohs hardness of 6.5, Tanzanite is somewhat more delicate than diamond or sapphire. A few simple rules suffice:

Remove Tanzanite jewelry during sports, housework, and sleep
Clean with a soft, slightly damp cloth
Avoid ultrasonic cleaners and steam cleaners
Store separately so that other pieces of jewelry do not scratch it

Our Tanzanite Jewelry

At Gallardos-Design, you will find handmade Tanzanite rings and Tanzanite pendants that highlight each stone in its full beauty. Each piece is unique – as rare and singular as the stone itself.