• Tiger’s Eye Value, Price, and Jewelry Information

    Tiger's Eye (Quartz): South Africa (rough mass ~ 3 inches long; blue and red cabochons are dyed). Photo ? Joel E. Arem, PhD, FGA. Used with permission.

    Tiger's Eye

    Tiger's Eye Information

    Data Value
    Name Tiger's Eye
    Is a Variety of Quartz
    Varieties Falcon's Eye
    Crystallography Hexagonal.
    Refractive Index 1.544-1.553
    Colors Golden brown (Tiger's eye); Blue (Hawk's eye); some pieces show both colors.
    Luster Vitreous.
    Hardness 7
    Wearability Very Good
    Fracture Conchoidal
    Specific Gravity 2.55-2.91
    Birefringence 0.009
    Cleavage None
    Dispersion 0.013
    Enhancements Bleaching, dyeing. Heat may create the eye effect.
    Typical Treatments Bleaching, Dyeing, Heat Treatment
    Transparency Opaque.
    Absorption Spectrum Not diagnostic.
    Phenomena Chatoyancy.
    Optics o?= 1.544; e?= 1.553 (very constant). Uniaxial (+).
    Optic Sign Uniaxial +

    Crocidolite, (blue asbestos,) alters to quartz, but while retaining its fibrous structure. This material is frequently stained by iron, giving it a golden brown color. We know this material as tigers eye. Unstained pieces, retaining their original blue color, are called Hawk’s Eye. There are also pieces with both colors.

    Sources

    Australia; China; Namibia; South Africa; England, UK; United States.

    Ready to learn how to identify gems on your own?

    Join our mailing list below to download a FREE gem ID checklist tutorial. See what’s inside…

    • Discover the 17 practical steps to gemstone identification (even if you’re just getting started with gemology)

    • Learn how you can use specific tools to gather data, make observations & arrive at an accurate ID

    • Explore a range of gemological tests… not only will you get familiar with the process but also time-saving shortcuts!

    国产白浆高潮正在播放