Fine, Victorian 18ct, 18k, 750 Gold chain and Turquoise bead necklace, length 20.5″, 11.6 Grams, Circa 1880
This gorgeous piece of jewellery is beautifully made with seven, Turquoise gemstones, connected with short lengths of rich yellow gold chain.
The central Turquoise measures 13x9x5mm and is connected with lengths of 6cm chain to three smaller Turquoise (8x6mm) on both sides, terminating with a loop and t-bar clasp fitting.
One of our favourite gemstones, the Turquoise nuggets vary slightly in colour, they are full of character with the typical black veins running through them – please see images.
Turquoise is the traditional birthstone for December.
Length: 20.5 inches (52cm)
Total weight: 11.6 grams
Hallmarks: None – tested as 18ct gold
Condition: Good condition
Date: Victorian (1837 to 1901)
Turquoise is a very porous and absorptive precious stone. When exposed to water, oils and other chemicals it soaks them up like a sponge, this can cause a variety of effects. Turquoise is a compound that includes metals such as aluminum, copper or iron. Water and oil can cause some of these metals to oxidize, or in other words rust. As a result of oxidation, the stones can change color. Blue turquoise that contains copper can change from a light blue to a dark green. The iron changes from green to darker green and aluminum from light blue to darker blues and greens.
The oils in our hands have a very similar affect as water. Over years, or even decades, of touching a turquoise stone with our fingers can lead to the stone changing color.