Hardness Of Turquoise

6 min read Jul 01, 2024
Hardness Of Turquoise

The Hardness of Turquoise: A Gemstone's Strength

Turquoise, with its captivating blue-green hues, has been prized for centuries for its beauty and spiritual significance. But beyond its aesthetic appeal lies another fascinating aspect – the hardness of turquoise. This property plays a crucial role in the gemstone's durability, care, and overall value. Understanding the hardness of turquoise allows us to appreciate its unique characteristics and make informed decisions when acquiring or caring for this beloved gemstone.

What is Hardness?

Hardness, in the context of gemstones, refers to a material's resistance to scratching. It is measured using the Mohs Hardness Scale, a relative scale developed by German mineralogist Friedrich Mohs in 1812. This scale ranks ten minerals from 1 (softest) to 10 (hardest), based on their ability to scratch or be scratched by other minerals.

The Hardness of Turquoise

Turquoise, on the Mohs Hardness Scale, typically falls between 5 and 6. This means that turquoise can be scratched by minerals like quartz (hardness 7) but can scratch materials like glass (hardness 5.5) and steel (hardness 4.5).

Implications of Turquoise's Hardness:

Turquoise's moderate hardness has several implications for its durability and care:


  • Susceptibility to Scratches: Due to its relatively low hardness of turquoise, it is susceptible to scratching from sharp objects, rough surfaces, and even prolonged contact with other jewelry pieces.
  • Impact Resistance: Turquoise is not particularly impact-resistant. A sharp blow or drop could cause chipping or breakage, especially if the turquoise is already flawed.


  • Cleaning and Storage: It's essential to clean turquoise gently with a soft cloth and mild soap. Avoid harsh chemicals, abrasive cleaners, and ultrasonic cleaners, which can damage the surface. Store turquoise separately from other jewelry to prevent scratching.
  • Avoid Exposure to Extreme Conditions: Turquoise can be sensitive to extreme temperatures and humidity. Avoid exposing turquoise to excessive heat, prolonged sunlight, or harsh chemicals.
  • Protection: It's advisable to wear turquoise jewelry carefully, especially during activities that could cause scratches or impacts.

Factors Influencing Turquoise Hardness:

While turquoise generally falls within the 5-6 range on the Mohs scale, its hardness can be influenced by several factors:

  • Composition: Turquoise is a hydrated phosphate mineral. Variations in its chemical composition, particularly the presence of impurities like iron or copper, can affect its hardness of turquoise.
  • Treatment: Some turquoise is treated to enhance its color or stability. These treatments can alter the gemstone's hardness and durability.
  • Origin: The hardness of turquoise can also vary slightly depending on its geographical origin. For example, turquoise from different mines might exhibit slight differences in hardness due to variations in mineral content.

The Value of Hardness in Turquoise:

The hardness of turquoise plays a significant role in its overall value. Higher hardness indicates greater durability and less susceptibility to damage, making a gemstone more valuable. However, it's important to note that other factors like color, clarity, and size also contribute to the value of turquoise.


The hardness of turquoise is a crucial aspect of this captivating gemstone. Understanding its moderate hardness level allows us to appreciate its strengths and limitations, ensuring its proper care and enjoyment. By employing gentle handling, appropriate cleaning methods, and avoiding harsh conditions, we can preserve the beauty and value of turquoise for generations to come. By recognizing the hardness of turquoise, we unlock a deeper understanding and appreciation for this remarkable gemstone.



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