Aurora Borealis Claw Set Rhinestone Bib Necklace - Vintage Mid buying Century 1950s on fine White Metal Chain

Aurora Borealis Claw Set Rhinestone Bib Necklace -
Vintage Mid Century 1950s on a fine White Metal Chain
The Aurora Borealis Rhinestones in this delicate necklace
are beautifully marked with pink and green striations.
The Rhinestones are claw set
and all complete and utterly beautiful.
The total length is 14 inches, the bib is 3 1/4 inches
and the drop is 1 1/8 inches.

Originally, rhinestones were rock crystals gathered from the river Rhine, hence the name, although some were also found in areas like the Alps, but today the name "rhinestone" applies only to varieties of lead glass known as crystal glass. The availability was greatly increased in the 18th century when the Alsatian jeweller Georg Friedrich Strass had the idea to imitate buying diamonds by coating the lower side of lead glass with metal powder. Hence, rhinestones are called strass in many European languages.

As opposed to the classic rhinestones, which had a metal powder coating on the bottom side only, several companies have opted to mass-produce iridescent lead glass, by reducing the metal coating thickness and apply it uniformly, not using metal powder with a binder but by applying various forms of metal deposition (thin foil, vapor deposition, etc): Favrile glass by Tiffany in 1894, Carnival glass under the name "Iridrill" by Fenton in 1908, "Aurora Borealis" glass by Swarovski in 1956 and PVD-coated dichroic glass in the late 20th century, amongst many other decorative lead glasses coated with a thin metal layer sold under various commercial names such as "rainbow glass", "aurora glass" and such.

Rhinestones can be used as imitations of diamonds, and some manufacturers even manage to partially reproduce the glistening effect real diamonds have in the sun