Where is Yellow Turquoise found?
Turquoise (var. yellow)
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Open the appYellow Turquoise occurs in specific geological environments. Knowing where to look, and in what kind of rock, is the difference between going home empty-handed and finding a great specimen.
Where to find Yellow Turquoise
China
A significant source of various minerals marketed as 'Yellow Turquoise', particularly Serpentine and Howlite.
United States (e.g., Arizona, Nevada)
While these states are known for true turquoise, genuine yellow turquoise is extremely rare. Most 'Yellow Turquoise' from these regions would be misidentified or treated material.
Africa (e.g., South Africa)
Sources of Serpentine that may be marketed as 'Yellow Turquoise'.
Collecting tips
- Be Skeptical of the Name. The term 'Yellow Turquoise' is almost always a trade name for a different mineral. Assume it is not true turquoise unless proven otherwise by a reputable gemological laboratory.
- Observe Color Uniformity. If the color is unnaturally uniform or vibrant, it may indicate dyeing. Natural turquoise (even rare yellow variants) would likely have more subtle color variations.
- Check Hardness. True turquoise has a Mohs hardness of 5-6. Serpentine is 2.5-5, Jasper is 6.5-7, and Howlite is 3.5. A scratch test (on an inconspicuous area) can help differentiate, but be cautious not to damage the specimen.
- Examine Matrix. While natural turquoise has matrix, examine if the matrix in 'Yellow Turquoise' appears painted on or unnaturally distinct, which can indicate treatment.
Quick Check
- Color:
- Yellow-green to yellowish, often with dark matrix.
- Luster:
- Waxy to dull.
- Streak:
- White (for Howlite or Serpentine), or colorless (for Jasper).
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