The Rare Colours of Tanzanite: Exploring Fancy Colour Zoisite in Jewellery

When most people think of tanzanite jewellery, they envision the deep, velvety blue that has made this gem world-famous. But beyond the iconic hue lies a hidden world of rare tanzanite colours—from vibrant pinks to citrus yellows—that are capturing the attention of gem collectors and jewellery designers alike.

Discovered in 1967 in the Merelani Hills of Tanzania, this unique blue gem is a variety of the mineral zoisite. Tiffany & Co. gave it the name tanzanite to honour its country of origin and quickly turned it into an international sensation. Today, tanzanite stands proudly among the “big five” of coloured gems—alongside diamond, ruby, sapphire, and emerald.

But blue is just the beginning of the story.

From Blue Beauty to Fancy Colour Rarity

What sets tanzanite apart is its remarkable pleochroism—the ability to display different colours when viewed from various angles. Most commercial tanzanite is heat-treated to enhance its signature blue-violet appearance, reducing any underlying brown or yellow-green tones.

However, in its natural or slightly altered state, zoisite can display exceptionally rare colours—shades that are far less known but increasingly desirable for coloured gemstone jewellery:

• Pink tanzanite (technically, pink zoisite) owes its romantic blush to traces of manganese.

• Yellow-green tanzanite can range from olive tones to soft lime hues.

• Pure yellow tanzanite is considered exceptionally rare and prized by connoisseurs.

• Other colours include orange zoisite and subtle peachy tones.

These hues are not commonly found in the market, making them ideal investment gemstones or rare gemstones for collectors seeking something truly unique.

Naming Controversy: Tanzanite or Zoisite?

Technically, the name “tanzanite” refers specifically to the blue variety of gem-quality zoisite. So, should the pink and yellow varieties also be called tanzanite?

From a gemological standpoint, no—these should be referred to as “fancy colour zoisite”, similar to how different quartz varieties are named (like amethyst, citrine, and rose quartz).

However, from a marketing perspective, labels like pink tanzanite or green tanzanite add a sense of locality and exclusivity that resonates with buyers. Until these gems gain broader recognition, the industry may continue using both terms interchangeably.

💎 Recommended Naming Approach:

To preserve accuracy while emphasizing rarity, we suggest terms like:

• Fancy Pink Zoisite

• Fancy Yellow Zoisite

• Fancy Orange Zoisite

Tanzanite Pricing: What Rare Colours Cost

While top-quality blue tanzanite jewellery can fetch $300–$400 per carat at wholesale, commercial-grade stones range from $100–$200 per carat. In contrast, fancy colour zoisite—due to its rarity—can command $700–$900 per carat, depending on cut, clarity, and intensity of colour.

These rare stones are not only visually striking but also hold value as investment gemstones, offering diversity to those looking to buy tanzanite in South Africa or invest in unique gemstones beyond traditional options.

Why Rare Tanzanite Colours Matter in Jewellery Design

In the world of fine jewellery, rarity and storytelling are everything. Incorporating pink tanzanite or yellow tanzanite into a custom ring or pendant instantly elevates the piece from beautiful to unforgettable. For discerning collectors or romantics looking to stand out, fancy colour zoisite opens up a fresh design palette unlike anything else in the gem world.

From custom engagement rings to heirloom-quality brooches, these colours bring a new dimension to tanzanite jewellery, blending the exotic with the elegant.

Final Thoughts: The Future of Fancy Colour Zoisite

While blue tanzanite will always be the crown jewel of Tanzania’s gemstone legacy, fancy colour zoisite is quickly emerging as a collector’s dream. As awareness grows and more jewellery designers embrace these unique hues, we may see pink tanzanite and yellow zoisite taking their rightful place alongside the world’s rarest and most captivating gems.

So, whether you’re a gemstone enthusiast, a collector, or someone looking to invest in truly rare gemstones, now is the perfect time to explore the untapped potential of fancy colour tanzanite jewellery.

Prins & Prins invites you to discover these extraordinary gems at our showroom in Cape Town or online. Let us help you craft a one-of-a-kind piece that tells your story—through colour.