Summary
Tanzanite is best known for its blue-violet color, which can appear blue, purple, or a mix of both depending on lighting and viewing angle. This color-shifting quality—called pleochroism—is what makes tanzanite so unique and visually striking.
Tanzanite is one of the most captivating gemstones in the world, and much of its appeal comes from its color. At first glance, it may look blue—but tilt it slightly or change the lighting, and rich violet tones begin to emerge. This dynamic color play is what sets tanzanite apart from other gemstones and makes it so sought after in fine jewelry.
Tanzanite’s Signature Blue-Violet Hue
Tanzanite is defined by its blend of blue and violet tones.
Unlike sapphires or other blue gemstones, tanzanite often shows multiple colors at once. Most high-quality stones display a vibrant sapphire-blue face-up appearance with flashes of purple or violet from different angles.
The most valuable tanzanites strike a balance—rich blue with a noticeable violet undertone rather than leaning too heavily toward one color.
Why Tanzanite Changes Color
Tanzanite’s color variation is caused by pleochroism, meaning it shows different colors when viewed from different directions.
In raw form, tanzanite can appear brownish or yellowish, but gentle heat treatment (a stable and accepted practice) brings out the iconic blue-violet tones. Lighting also plays a big role—natural daylight emphasizes blue, while indoor or warm lighting highlights purple hues.
Common color appearances include:
- Blue-violet – the most prized and recognizable
- Deep blue – sapphire-like tones
- Violet or purple – richer and more dramatic
- Bluish-purple – balanced and versatile
How Color Affects Tanzanite Value
Color is the most important factor when determining tanzanite’s value.
Stones with strong saturation, medium to medium-dark tone, and an even blue-violet blend are the most desirable. Pale stones or those with gray or brown undertones are typically less valuable.
Here’s a quick breakdown of color quality:
| Color Feature | Impact on Value |
|---|---|
| Vivid blue-violet | Highest value |
| Even saturation | More desirable |
| Medium-dark tone | Ideal brilliance |
| Gray or brown undertones | Lower value |
Understanding tanzanite color helps explain why some stones feel electric—while others appear softer and more subtle.
If you’d like to learn more about tanzanite color or explore tanzanite jewelry options, contact The Diamond Reserve. We’re happy to help you find a gemstone that truly stands out. Give us a call at 303-385-8449 or click here to schedule an appointment.
FAQs
Is tanzanite blue or purple?
Both—tanzanite naturally shows blue and violet tones, often at the same time.
Does tanzanite look different in different lighting?
Yes. Daylight brings out blue tones, while indoor lighting emphasizes purple.
Is all tanzanite heat treated?
Most tanzanite is gently heat treated to enhance color, which is permanent and standard.
What is the best color for tanzanite?
A vivid blue with noticeable violet undertones is considered the most valuable.
Can tanzanite fade over time?
No. Tanzanite’s color is stable under normal wear and care.
