1st - Gold 
January 
February 
March 
April 
May 
June 
July 
August 
September 
October 
November 
December 
Capricorn - Garnet 
Aquarius - Amethyst 
Pisces - Aquamarine 
Aries - Diamond 
Taurus - Emerald 
Gemini - Pearl 
Cancer - Ruby 
Leo - Peridot 
Virgo - Blue Sapphire 
Libra - Opal 
Scorpio - Topaz 
Sagittarius - Tanzanite 
Sapphire vs Tanzanite
Which Blue Gemstone Should You Choose?
Choosing between Sapphire and Tanzanite can be challenging for lovers of blue gemstones. Both feature captivating blue hues, but they differ in composition, hardness, value, and suitability for jewellery.
This comprehensive Sapphire vs Tanzanite comparison guide will help you understand the differences, so you can select the gemstone that best suits your style, budget, and investment goals.
Sapphire vs Tanzanite: Quick Comparison
| Feature | Sapphire | Tanzanite |
|---|---|---|
| Mineral Family | Corundum | Zoisite |
| Hardness | 9 – Extremely durable | 6.5 – 7 – Softer, requires careful wear |
| Value | High; premium blue gemstone | Moderate; prized for vivid blue-violet colour |
| Best For | Investment jewellery, engagement rings, heirloom pieces | Fashion jewellery, statement pieces, occasional wear |
| Professional Guides | Sapphire Buyer’s Guide | Tanzanite Buyer’s Guide |
Sapphire Features, Colour & Investment Value Explained
Sapphire is a classic blue gemstone known for durability and prestige. Ranking 9 on the Mohs scale, sapphires are ideal for rings and jewellery worn daily. The most valued sapphires display deep royal blue or cornflower blue, and colour directly affects value.
Origins & History:
Sapphires are mined in Sri Lanka, Madagascar, Myanmar, and Thailand. Historically, sapphires symbolised wisdom, loyalty, and nobility, making them a top choice for engagement rings and high-end jewellery.
Price Guide (per carat):
R10,000 – R350,000 depending on colour, clarity, and origin.
Tanzanite Features, Colour & Durability Explained
Tanzanite is celebrated for its vivid blue-violet hues. Mohs hardness is 6.5–7, which is softer than sapphire and requires protective settings in rings or bracelets.
Origins & History:
Tanzanite is only found in northern Tanzania near Mount Kilimanjaro. It was discovered in the 1960s and has become one of the most sought-after blue gemstones in contemporary jewellery.
Price Guide (per carat):
R2,500 – R50,000 depending on colour saturation and clarity.
Sapphire vs Tanzanite: Detailed Technical Comparison
| Feature | Sapphire | Tanzanite |
|---|---|---|
| Chemical Composition | Aluminium oxide (Al2O3) with trace elements (iron, titanium) | Calcium aluminium silicate (Ca2Al3(SiO4)(Si2O7)O(OH)) with vanadium |
| Colour | Royal blue, cornflower blue, vivid deep blue | Blue-violet, violet-blue, medium-dark blue |
| Hardness (Mohs) | 9 – Extremely durable | 6.5 – 7 – Softer, needs protective wear |
| Refractive Index | 1.762 – 1.770 | 1.691 – 1.700 |
| Specific Gravity | 3.95 – 4.03 | 3.35 – 3.38 |
| Clarity & Inclusions | Typically eye-clean; minor inclusions may be present | Eye-clean to slightly included; high transparency prized |
| Origin | Sri Lanka, Myanmar, Madagascar, Thailand | Northern Tanzania only |
| Treatment | Heat treatment common | Heat treatment standard to enhance blue-violet colour |
| Best Use | Engagement rings, heirlooms, high-end jewellery | Fashion rings, occasional wear, statement pieces |
Sapphire vs Tanzanite: Colour, Hardness & Care Tips
Colour Comparison:
- Sapphire: Rich royal blue to cornflower blue; colour drives value.
- Tanzanite: Blue-violet to violet-blue; prized for vivid saturation and rare origin.
Durability:
- Sapphire: Mohs 9 – excellent for daily wear.
- Tanzanite: Mohs 6.5–7 – requires protective settings and careful handling.
Care Tips:
- Sapphire: Safe for everyday wear; clean with mild soap, avoid harsh chemicals.
- Tanzanite: Avoid hard knocks; clean with soft cloth or gentle soap and water.
Sapphire vs Tanzanite: How to Tell Them Apart
💡 Tip: Examine hardness and colour tone. Sapphires are harder and show more brilliance. Tanzanites often have violet undertones and are softer, requiring careful handling. Professional verification recommended for high-value stones.
Sapphire Summary
- Hardness: Mohs 9 – extremely durable
- Colour: Royal blue, cornflower blue
- Refractive Index: 1.762 – 1.770
- Clarity: Usually eye-clean
- Care: Suitable for daily wear; avoid harsh chemicals
Tanzanite Summary
- Hardness: Mohs 6.5–7 – requires careful wear
- Colour: Blue-violet, vivid saturation
- Refractive Index: 1.691 – 1.700
- Clarity: Eye-clean to slightly included
- Care: Avoid impact; protective settings recommended
Buying Tips
- Always request certification for sapphires and tanzanites.
- Check colour intensity and clarity; blue saturation is key for value.
- Confirm any heat treatments disclosed.
- Secure settings recommended for tanzanite rings due to lower hardness.
- Browse our Sapphire Gemstones and Tanzanite Gemstones.
Which Blue Gemstone Should You Choose?
Understanding these differences ensures you select the gemstone that aligns with your style, budget, and long-term satisfaction.
Sapphire: Durable, prestigious, ideal for investment and everyday wear.
Tanzanite: Stunning, moderately durable, perfect for statement jewellery and special occasions.
Sapphire vs Tanzanite FAQ’s
Can tanzanite be mistaken for sapphire?
Yes, due to similar blue tones; professional verification recommended.
Which gemstone is more durable?
Sapphire, with Mohs hardness 9.
Are sapphires treated?
Most are heat-treated to enhance colour.
How should I care for tanzanite jewellery?
Avoid impact and harsh chemicals; clean gently.
Can tanzanite be worn daily?
Possible, but protective settings are recommended.
Which gemstone is better for investment?
Sapphire is the superior choice for long-term value.
COMPARE GEMSTONES WITH CONFIDENCE
Gemstone Comparison Guides
Choosing between two beautiful gemstones can be challenging. Our professional Gemstone Comparison Guides help you clearly understand the differences between popular gemstones so you can make a confident and informed choice.
Each comparison explores the key factors that influence gemstone quality and value, including colour, clarity, durability, rarity and typical treatments. You will also learn how similar-looking gemstones differ in appearance, composition, hardness and more.
HERE IS ALL THE PROFESSIONAL INFORMATION YOU NEED
Gemstone Buyer's Guides
Buying a gemstone should be exciting — but understanding quality, rarity and value is essential before making the right choice. Our professional Gemstone Buyer’s Guides help you understand how colour, clarity, cut and treatments influence the beauty and value of different gemstones.
Each guide explains the key quality factors used by gemologists, including gemstone composition, colour grading, natural inclusions, treatments and origin. You will also learn how these factors affect rarity, durability and market value.
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