SOLD Ametrine, 16.41 ct. Bolivian, Flawless, Master Cut

SOLD Ametrine, 16.41 ct. Bolivian, Flawless, Master Cut

Natural Ametrine

• Gem Type: Ametrine
• Weight: 16.41 Carats
• Size: 16.9 x 16 x 12mm
• Grading: Flawless
• Design:  Custom
• Color: Purple, Yellow, Multicolored
• Origin: Bolivia 
• Treatment: None at all
• Hardness: 7
• Refractive Index: 1.54-1.55
• Cut: Custom cut by Doug (Award winning/USFG Certified Master Faceter)

Ametrine is a variety of bi-color quartz that has zones of amethyst (purple) and citrine (golden yellow) in contact with one another in a single crystal. This material is known by other less-frequently used names including: “amethyst-citrine,” “trystine,” “bicolor amethyst,” “bi-color quartz,” and “bolivianite.” The bolivianite name is a response to the material being designated as the national gemstone of Bolivia. It is a mixture of amethyst and citrine with zones of purple and yellow or orange. Natural Ametrine is a rare gemstone with a finite supply that is produced in commercial quantities at only one mine in the world. The color of the zones visible within ametrine is due to differing oxidation states of iron within the crystal. The different oxidation states occur due to there being a temperature gradient across the crystal during its formation.

*CARE (Ametrine)*

Ultrasonic: Usually safe Steamer: Risky Heat: Fair; color change may occur with heat Chemicals that harm: Hydrofluoric acid, ammonium fluoride can damage. Best; Warm, soapy water and then gently clean with a soft brush. Dry with a soft cloth or air dry. *CLARITY CHART*

IF – Internally flawless; free of inclusions VVS – Very, very slight inclusions; microscopic inclusions barely       seen under a loupe with 10x magnification VS – Very Slight inclusions; visible inclusions that can be seen under magnification and sometimes also with the unaided eye. SI – Small inclusions; inclusions that are obvious under magnification and to the unaided eye. I – Heavy or large inclusions obvious to the naked eye