Natural stones have a way of catching our attention.
It might be the deep blue of turquoise, the shifting colours of labradorite, the rich red of garnet or the soft, earthy patterns found in agate.
But have you ever wondered what makes these stones different from one another, or why two stones of the same type can look so different?
Understanding a little about natural stones can help you appreciate their individual character and make more informed choices when buying jewellery.
What do we mean by natural stones?
Natural stones are materials that originate in nature rather than being manufactured entirely by people.
Many gemstones used in jewellery are minerals formed through geological processes over long periods. Others, such as certain rocks made up of several minerals, are also used in jewellery.
Each material has its own composition, structure and physical properties. These influence its colour, pattern, hardness and how it behaves when cut, polished or worn.
Natural doesn't automatically mean completely untreated, though. Some stones may be dyed, stabilised, heated or otherwise treated to improve their appearance or durability.
That is why it is useful to ask what a stone is made from and whether it has undergone any treatments.
Why do natural stones have different colours?
A stone's colour can be influenced by its chemical composition, trace elements, internal structure, and how it interacts with light.
For example, garnet occurs in several colours, although deep red varieties are especially familiar in jewellery.
Labradorite is known for a phenomenon called labradorescence. When light enters the stone and interacts with its internal structure, flashes of blue, green or other colours may appear.
Agate can display bands and patterns formed as mineral-rich fluids deposit silica over time.
These differences are part of what makes selecting natural stones so interesting. Even within one type, individual pieces may have noticeably different appearances.
Are all natural stones equally durable?
No. This is an important point when choosing jewellery.
Some stones are relatively resistant to scratching, while others are softer or more likely to chip if knocked.
Hardness is not the same as toughness. A stone may resist scratches but still fracture when dropped or struck.
The way a stone is cut, its internal features and any treatments can also affect its durability.
For this reason, a stone that works well in a necklace may require more protection in a ring or bracelet that is exposed to frequent knocks.
What about stabilised stones?
You may come across terms such as stabilised turquoise when shopping for jewellery.
Stabilisation involves treating a material, commonly with a polymer or resin, to improve its stability and suitability for use.
Turquoise is a good example because it can be relatively porous and may vary considerably in hardness and durability.
Stabilised turquoise and untreated turquoise can have different care requirements. Stabilisation does not mean the material is automatically imitation turquoise, but it is a treatment that should be disclosed accurately.
When a listing says a stone is natural, it is reasonable to ask whether it has been treated if that information matters to you.
Why do natural stones work so beautifully with pearls?
Pearls and natural stones bring different qualities to a jewellery design.
Pearls have a distinctive lustre created by their nacre. Stones offer a wider variety of colours, patterns, textures and finishes.
Together, they can create interesting contrasts.
A creamy pearl alongside deep garnet can feel rich and dramatic. Turquoise paired with a white pearl creates a fresh contrast, while labradorite can complement pearls with its subtle flashes of colour.
There are no fixed rules. Much depends on the materials and how you arrange them. To understand more about what makes each pearl individual, read our guide to what makes a pearl unique. And if you're drawn to irregular pearl shapes in particular, read our guide to why baroque pearls are so special.
How to choose natural-stone jewellery
Start with the colours and textures you naturally gravitate towards.
If you love bold colours, turquoise or garnet might appeal. If you prefer subtle variations, labradorite, smoky quartz or agate may be worth exploring.
Consider where you intend to wear the jewellery and how much everyday handling it will get.
Ask about the stone's identity, any treatments and the care it requires. A good description should help you understand what you are buying, rather than relying on the word "natural" alone. Our guide on what can damage natural stones is also worth reading before you make your choice. When you're ready to choose a piece, read our guide to choosing a pearl necklace: what really matters.
Stones and the zodiac
Many natural stones also carry traditional associations with the zodiac signs. If you'd like to explore how specific stones connect to your sign — and how they combine with genuine pearls — the zodiac series goes deeper into each one:
Aries (garnet, carnelian) · Taurus (green aventurine, rose quartz) · Gemini (citrine, agate) · Cancer (moonstone, rose quartz) · Leo (citrine, tiger's eye) · Virgo (moss agate, amazonite) · Libra (rose quartz, lapis lazuli) · Scorpio (garnet, labradorite) · Sagittarius (turquoise, amethyst) · Capricorn (smoky quartz, garnet) · Aquarius (amethyst, labradorite) · Pisces (aquamarine, amethyst)
Celebrating nature's individuality
One thing I enjoy about working with natural stones is that no two pieces are necessarily identical.
Their colours, patterns, and small variations can influence a design's direction. Sometimes a stone's character is the starting point; sometimes it's how it works alongside a particular pearl.
At Pearl Art Nature, I bring genuine pearls and natural stones together in handmade jewellery, choosing combinations that allow their individual qualities to complement one another.
The more you learn about natural stones, the more you begin to notice those details.
And sometimes, that is what makes a piece of jewellery feel special: not just how it looks, but the natural character behind it.