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Mohs
6.5
System
Orthorhombic
Chakra
Third Eye
Zodiac
Sagittarius
Jupiter, Saturn
Tanzanite is found in only one place on Earth — the Merelani Hills of Tanzania. Its trichroic nature displays blue, violet, and burgundy depending on the viewing angle.
| Mohs Hardness | 6.5 |
| Crystal System | Orthorhombic |
| Chemical Formula | Ca₂Al₃(SiO₄)(Si₂O₇)O(OH) |
| Origin Countries | Tanzania |
Supports skin, hair, and immune system.
Calms overthinking, promotes composure.
Links mind and heart, integrates spiritual insight.
Tanzanite's story is remarkably recent compared to most precious gemstones, discovered only in 1967 near Mount Kilimanjaro in Tanzania's Merelani Hills. A Maasai tribesman named Ali Juuyawatu first spotted the brilliant violet-blue crystals, initially mistaking them for sapphires. The gemstone was scientifically identified as a variety of zoisite and subsequently named 'tanzanite' by Tiffany & Co., who recognized its exceptional beauty and launched it into international prominence. The name honors its singular geographic origin—tanzanite remains the only place on Earth where this gemstone is found.
Unlike ancient gems steeped in millennia of folklore, tanzanite's cultural significance has developed rapidly within living memory. Tiffany's marketing campaign in the late 1960s positioned it as an alternative to sapphire, emphasizing its rarity and unique pleochroic properties that display different colors from different angles. The American Gem Trade Association added tanzanite as a December birthstone in 2002, cementing its place in modern gemological tradition. Local Maasai communities have incorporated tanzanite into their cultural practices, viewing it as a stone of new beginnings and transformation, befitting a gem that has transformed their region's economy.
With a hardness of 6.5 on the Mohs scale, tanzanite requires gentle handling to prevent scratching and chipping. Clean your tanzanite with lukewarm soapy water and a soft brush, avoiding harsh chemicals, ultrasonic cleaners, and steam cleaners which can damage the stone. Store tanzanite separately from harder gemstones in soft pouches or lined compartments to prevent surface damage. Avoid exposing tanzanite to sudden temperature changes, as thermal shock can cause fracturing. Remove tanzanite jewelry before engaging in physical activities, household cleaning, or applying cosmetics and perfumes. The stone is sensitive to heat, so keep it away from direct sunlight for extended periods and never attempt to clean it with hot water or expose it to jeweler's torches during repairs.
Tanzanite resonates powerfully with Sagittarius, Pisces, and Gemini individuals, supporting their natural inclinations toward spiritual exploration, intuition, and communication. This stone particularly benefits those undergoing major life transitions, career changes, or spiritual awakening, as it facilitates transformation and higher consciousness. Creative professionals, teachers, counselors, and public speakers may find tanzanite enhances their ability to communicate complex ideas with clarity and inspiration. Individuals drawn to meditation, psychic development, or energy healing work often connect deeply with tanzanite's third eye and crown chakra activation. Those born in December can embrace tanzanite as their birthstone for enhanced intuition and spiritual growth. Anyone seeking to strengthen their connection to divine wisdom, improve their communication skills, or navigate periods of personal transformation may benefit from working with this remarkable violet-blue gem.
Tanzanite is approximately 1,000 times rarer than diamond, found only in a four-kilometer mining area in northern Tanzania.
The gemstone displays remarkable pleochroism, appearing violet, blue, or burgundy depending on the viewing angle and lighting conditions.
Most tanzanite undergoes heat treatment at approximately 500-600°C to enhance its violet-blue color and remove brownish tints.
Geological experts estimate that all tanzanite deposits could be exhausted within the next 20-30 years, making it increasingly precious.
Tanzanite was featured prominently in James Cameron's film 'Titanic' as the Heart of the Ocean necklace, boosting its popular recognition.
The largest tanzanite crystal ever found weighed 16,839 carats and was discovered in 2005 by small-scale miners in Tanzania.
Avoid combining with:
Tanzanite is the modern birthstone for december.
The supreme stone of spiritual protection and purification, Amethyst calms the mind and deepens meditation.
The fastest-acting Vedic gem, Blue Sapphire channels Saturn for discipline, karma, and protection.
A stone of royalty and wisdom, Lapis activates the higher mind and truthful communication.