Turquoise
Turquoise is a gemstone cherished since ancient times, characterized by its beautiful blue-green color. Because it has a fibrous structure and dyed imitations are in circulation, caution is needed when identifying it. When observed with a loupe, dye deposits can be confirmed.
Turquoise, used for ancient ornaments
Basic Information
| Chemical Formula | CuAl₆(PO₄)₄(OH)₈·4H₂O |
|---|---|
| Classification | Triclinic |
| Hardness | 5-6 (Mohs scale) |
| Specific Gravity | 2.63 |
Characteristics
- Has been used for decorative purposes for over 6,000 years.
- Extremely rare to grow as crystals.
- In dyed products, dye can be seen between fibers.
- Exhibits pleochroism from blue to green, with rare variations also existing.
Trivia: The name "Turkish stone" originated from the fact that it entered Europe via Turkey. Actual production sites are mainly Iran, Egypt, and the United States.