What is quartz in jewellery?
By Jared James · Last updated 21 May 2026
Definition
Quartz is one of the most abundant minerals on earth, made of silicon dioxide, and it encompasses an enormous family of gemstones used in jewellery. The clear, colourless form is called rock crystal, and its various coloured varieties have their own names: amethyst for purple, citrine for yellow, rose quartz for pink, smoky quartz for grey to brown, and aventurine for the green sparkly kind. Quartz varieties are generally hard enough for everyday wear, affordable and available in large sizes, making them some of the most widely used gemstones.
Frequently asked questions
- What is the difference between quartz and crystal?
- Crystal is a general term for any mineral that forms in a regular, repeating atomic structure, and quartz is one type of crystal. In everyday language, quartz crystal usually refers to the clear, transparent variety of quartz rather than amethyst or rose quartz.
- Is quartz a precious or semi-precious stone?
- Quartz varieties are classed as semi-precious. Some forms, like high-quality amethyst in deep purple or fine rutilated quartz, can be quite valuable, but in general quartz is widely available and modestly priced compared to sapphire, ruby or emerald.
- Can quartz jewellery be worn every day?
- Yes, most quartz varieties are hard and durable enough for daily wear in rings, earrings and pendants. Some, like rose quartz, can fade with prolonged direct sunlight, so it is worth removing pieces before long outdoor days.
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