Firooz Nishaburi Iranian, 31.75 carats

Technical details: Type: Firooz Nishaburi Iranian (Turquoise) Weight: 31.75 carats Shape: Oval Color: Persian sky blue Clarity: Unclassified (Uncategorized) Transparency: Opaque Hardness: 5.0-6.0 Treatment: Porosity enhancement Origin: Nishaburi Iranian Certification: Electronic certificate (PDF) from Saudi Laboratory (MT) - website (www.mtgl.com.sa) The turquoise is characterized by its bright and pure sky blue color, which is often free of impurities or brown/black veins (known as "matrix"), or may contain few thin veins of iron oxide or limonite that increase its beauty. It is known for its good hardness and ability to retain its distinctive blue color for long periods.