Tanzanite
/ˈdʌɪəmənd/a hard, rare and precious, colourless carbon mineral
An African Story Written in Violet-Blue: Discover Tanzanite at The Diamond Works Institute
No visit to Cape Town is complete without a visit to The Diamonds Works Institute, the only polishing studio in the Southern Hemisphere – and home to one of the most beautiful collections of tanzanite in the world.
A thousand times rarer than diamonds, this uniquely African gem captivates people with its stunning blue and violet hues. Our master goldsmiths design and craft tanzanite earrings, pendants and rings, each delicately hand-worked to showcase the beauty and essence of tanzanite.
The one-generation gem
Found only in the foothills of Mount Kilimanjaro, tanzanite stone is a geological wonder. Its distinctive colour (often described as ‘velvet blue’), inherent beauty, fascinating origin story, and natural scarcity, makes it a sought-after gemstone for discerning collectors and jewellery lovers who understand they’re acquiring something truly special.
Adding to its allure, tanzanite’s unique color shifts under different lighting conditions, displaying a mesmerizing spectrum ranging from deep sapphire blue to vibrant violet. This phenomenon, known as pleochroism, is one of the reasons it’s cherished not only for its rarity but also for its dynamic beauty.
From mine to masterpiece
Each carefully selected gem in our collection is sourced from the only known deposit in the world – a narrow strip of land in Tanzania’s Merelani Hills. The Diamond Works Institute’s dedication to sustainability means that every tanzanite in our showroom is not only beautiful but also ethically and responsibly acquired from the best in the business.
For those looking for a one-of-a-kind piece of jewellery, our expert designers are ready to turn your vision into reality. Collaborate with our master craftsmen to create your very own tanzanite masterpiece – a piece of Africa shaped by your own story and infused with your own unique style and creativity. Whether you’re looking for tanzanite earrings, a tanzanite ring, a tanzanite necklace or a statement tanzanite engagement ring, it’s the perfect way to capture a special moment in your life.
The secret life of tanzanite
Our consultants are eager to share the journey a tanzanite makes from rough stone to dazzling jewel, and the meticulous cutting and polishing processes that enhance its colour and intensity.
Step into the world of tanzanite through our exclusive guided tours. Journey with us as we explore this gem’s fascinating history, witness master craftsmen demonstrate cutting and polishing techniques, and marvel at nature’s artistry through our stunning collection of tanzanite – encompassing the entire colour spectrum, from the softest whispers of violet to the deepest blue. Learn how the most intense (or colour saturated) tanzanite stones are the rarest and most valuable, and how craftsmen coax the deepest colours and hues from each individual gem. Complete your experience by choosing your own piece of African heritage to treasure forever.
A match made in heaven: diamonds and tanzanite
The tanzanite collection at The Diamond Works Institute ranges from subtle everyday pieces to magnificent statement jewels.
Each design allows the stone’s natural beauty to take centre stage, whether set in classic solitaire rings or pendants – or paired with natural white diamonds for a spectacular show of colour and sparkle.
All our pieces become treasured heirlooms, carrying both personal meaning and geological significance. Gaze in wonder at your hand, take immense joy and pleasure in your chosen piece, and remember your African journey forever.
“Enjoyment of ownership is so important. I love it when people wear their jewellery, taking immense pleasure and enjoyment in something that holds special meaning for them.”
– Mark Gieljoumie, GIA Gemologist at The Diamond Works Institute
Whether you love jewellery and gemstones, are looking to delve deeper into Africa’s history, or are simply seeking a unique experience in Cape Town, The Diamond Works Institute is your destination of choice. Immerse yourself in a world of diamonds and tanzanite and leave with unforgettable memories – matching the magic and beauty of the stones themselves.
The Sparkling Tour
Explore the world of tanzanite in person with a complimentary museum and showroom tour. Book now for a personal experience.