Formula : SiO2
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Mineral hardness (Mohs)
Particular hardness: 7
Smoky quartz can only be scratched by materials that are of equal or higher hardness. Diamond might scratch smoky quartz for example. Due to its toughness smoky quartz will not break easily.
As a result of its durability it is a popular precious stone for use in jewellery.
Smoky quartz occurs in typical smoky colours, sometimes with a hint of yellow, these colours range from light gray/yellow to shades of deep brown or even black.
The beautiful earthy tones of the stone have become more popular in recent times. When combined with red or rose gold jewellery this precious stone makes for a beautiful piece of jewellery.
Origin & History
Smoky quartz is most commonly found in: Bolivia, Brazil, India, Madagascar, Namibia, Russia, Sri Lanka, Zambia and Zimbabwe.
Smoky quartz has never been very significant. For a few years now, the use of smoky quartz has become more frequent. It has been said smoky quartz helped with stress or anxiety. The gem was supposed to help its wearer relax, let go and accept. Additionally, smoky quartz was said to protect against negative radiation from electrical appliances.
When it comes to care for smoky quartz it has a lot in common with the other types of quartz: amethyst and citrine. Like the other stones mentioned, smoky quartz may discolour or even lose its colour entirely when exposed to sunlight for prolonged periods of time.
For more information, do check out our article on amethyst.
Glass may be used to create imitations for smoky quartz, though in most cases imitations of smoky quartz are not used because of smoky quartz’ typical colour.
Smoky quartz may appear in any number of cuts. There is not one specific preferred cut for smoky quartz. The appropriate cut is decided on after assessing the colour and quality of the stone. Smoky quartz is generally cut in larger size stones to achieve a vibrant colour.
Jewellery with smoky-quartz can be found here: