Guide
Tanzanite specimens for sale
232 for sale · $100–$375,000 USD
262 in the gallery
Tanzanite is a violet to blue pleochroic variety of zoisite, prized for its rich color when cut as gem, with a vitreous to adamantine lustre and well-formed prismatic crystals. The finest stones come from Tanzania, especially the Merelani Hills, where high-grade crystals produce vibrant, saturated hues. Collectors value stand-alone crystals and cut gems alike for their striking color change under different lighting and their relatively limited geographic occurrence. Other notable localities include Kenya and China, contributing to a diverse array of crystal habits and sizes that enrich a well-rounded cabinet.
- Formula
- Ca2Al3Si3O12(OH)
- Rarity
- Rare
- Stability
- Stable
- Collector interest
- Very High Interest
- Classification notes
- Epidote group sorosilicate; Silicate minerals (Epidote group)
Key characteristics
- Crystal system
- orthorhombic
- Mohs hardness
- 6–7
- Specific gravity
- 3.1–3.38
- Luster
- vitreous
- Transparency
- transparent, translucent
- Color
- blue, violet, brown
- Streak
- white
- Cleavage
- perfect
- Fracture
- uneven, conchoidal
- Crystal habit
- prismatic, tabular, granular, massive
- Gem mineral
Buy Tanzanite specimens
View all 232Where Tanzanite is found
Top localities
- Merelani Hills123 specimens
- Kenya1 specimen
- Arusha Region1 specimen
- Quanzhou1 specimen
- Tennessee1 specimen
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About Tanzanite
In hand specimens and thumbnail clusters, Tanzanite displays a range of blue to violet tones, often showing zoning or color zoning that highlights its crystal structure. Though popular as a gemstone, natural crystals preserved in matrix and well-defined faceted pieces offer strong appeal for display and scientific interest. Collectors seek clean, well-terminated crystals with minimal alteration, as well as high-quality cut stones that reveal the stone’s distinctive color traits. Its cultural association and constrained geographic source add to its allure for mineral enthusiasts who appreciate both aesthetics and locality.
