Simple yet stunning, the turquoise is a great option for anyone who wants to stylize their outfit. And while this jewel is known all over the world, how many people are aware of the story behind its formation? Not many, we’re sure.
So if you find yourself interested in this topic, then we highly encourage you to continue reading.
But First, What Is Turquoise?
Part of the phosphate mineral clan, the turquoise is known for its opaque surface. It is generally found in shades of blue and green, however, the sky-blue variation is definitely the most desired.
Today, this jewel is known for being the December birthstone and is greatly loved for its association with positivity, possibilities, and happiness.
How Is It Formed?
The turquoise is essentially a secondary mineral – a type of mineral created through the transformation of primary minerals.
It is a hydrous phosphate of aluminium and copper, and is primarily found in arid environments.
The formation of this stone generally occurs through the gradual filtration of acidic aqueous solutions into the veins and fractures present within alumina-rich, sedimentary, weathered, or volcanic rocks. Over time, this solution hardens and eventually becomes the turquoise that we see and love today.
For the most part, the mineralization process takes place relatively close to the earth’s surface and can be found about 20 feet deep. That said, this mineral can also be found at greater depths in areas where the water table is high.
Do They Undergo Treatment?
Yes, they do.
Turquoises typically undergo one or more types of treatment before being considered fit for sale. The three main methods used are as follows….
- Stabilization: During this process, the stone is placed under pressure until it absorbs a clear liquid known as epoxy. This liquid hardens the stone and enhances its durability. The result is generally long-lasting, provided the stone is treated with care.
- Dyeing: In certain cases, the turquoise is dyed with blue pigments to improve its hue. However, the result of this particular treatment is not long-lasting. Therefore dyed turquoises are best avoided.
- Waxing and Oiling: Unlike other gemstones, turquoises do not have an intense shine. That said, in some cases, they may exude a waxy or wet glow. Interestingly, the ‘wetting effect’ is created through this method and involves the application of a thin film of wax or oil on the surface of the stone. But this treatment is rarely carried out in this day and age.
Points to Keep In Mind When Buying This Gem.
- Colour: Unsurprisingly, the turquoise’s colour is its most important USP. High-quality stones showcase a bright blue hue that looks similar to robin’s eggs.
- Clarity: Superior-quality turquoises typically display a pure, evenly spread-out bright blue colour without the presence of a matrix.
Note: The matrix refers to the splotches or veins that are sometimes present on the surface of the stone. - Cut: More often than not, top-quality turquoises are carved into cabochons and can be flaunted in a variety of shapes. That said, round and oval shapes are the most common by far.
There you have it! We hope you found this article useful.
Also Read: How Are Pearls Formed?
