The Complete Gemstone Guide
The Complete Gemstone Guide
Explore the world of precious and semi-precious gemstones, from colour and symbolism to hardness, birthstones, jewellery styles and care.
What Are Gemstones?
Gemstones are naturally occurring minerals, rocks or organic materials admired for their beauty, rarity and durability. They have been used in jewellery for centuries, valued for their colour, meaning and timeless appeal.
From emeralds and rubies to sapphires, pearls and opals, each gemstone has its own story. Some are prized for vivid colour, some for brilliance, and others for their cultural or symbolic meaning.
This guide is designed to help you understand gemstone types, quality factors, colours, shapes, durability and care before choosing a gemstone for jewellery.
Precious vs Semi-Precious Gemstones
Traditionally, gemstones were grouped into precious and semi-precious categories. Today, value depends more on rarity, quality, origin, colour and craftsmanship.
| Precious Gemstones | Semi-Precious Gemstones |
|---|---|
| Traditionally includes diamond, ruby, sapphire and emerald. | Includes gemstones such as amethyst, aquamarine, citrine, garnet, opal, peridot, topaz and tourmaline. |
| Often valued for rarity, durability, colour intensity and historic demand. | Can still be rare, valuable and highly desirable depending on quality and origin. |
Popular Gemstones
Learn about the most admired gemstones used in fine jewellery, engagement rings, earrings, pendants and custom designs.
Emerald
Known for its rich green colour and elegant, timeless appeal.
Ruby
A vibrant red gemstone associated with love, passion and strength.
Sapphire
Most loved in blue, sapphire is prized for beauty and durability.
Opal
Famous for its play-of-colour and strong connection to Australia.
Pearl
A classic organic gemstone loved for bridal and timeless jewellery.
Morganite
A soft pink gemstone known for romantic, feminine jewellery.
Aquamarine
A pale blue gemstone with a fresh, elegant and ocean-inspired feel.
Amethyst
A purple gemstone admired for colour, meaning and accessibility.
Gemstone Colours
Colour is one of the most important quality factors in coloured gemstones. Hue, tone and saturation all influence beauty and value.
Green
Emerald, peridot, green tourmaline.
Blue
Sapphire, aquamarine, blue topaz.
Red
Ruby, garnet, spinel.
Pink
Morganite, pink sapphire, tourmaline.
Purple
Amethyst, purple sapphire, spinel.
Yellow
Citrine, yellow sapphire, topaz.
White
Pearl, white sapphire, moonstone.
Multicolour
Opal, tourmaline, alexandrite.
Gemstone Hardness Guide
The Mohs hardness scale helps explain how well a gemstone resists scratching. This is especially important when choosing jewellery for everyday wear.
| Hardness | Gemstone Examples | Jewellery Suitability |
|---|---|---|
| 10 | Diamond | Excellent for everyday rings and fine jewellery. |
| 9 | Ruby, Sapphire | Very durable and suitable for frequent wear. |
| 7–8 | Topaz, Aquamarine, Amethyst, Garnet | Good for jewellery with mindful care. |
| 5–6.5 | Opal, Pearl, Turquoise | Best for careful wear and protective settings. |
Birthstones by Month
Birthstones are gemstones traditionally associated with each month of the year, often chosen for meaningful gifts and personalised jewellery.
Popular Gemstone Shapes
Gemstone shape affects the overall look, brilliance and style of a jewellery piece.
Round
Classic, balanced and brilliant.
Oval
Elegant and elongating on the hand.
Pear
Soft, graceful and distinctive.
Emerald
Clean, architectural and sophisticated.
Marquise
Dramatic, elongated and vintage-inspired.
Cushion
Romantic with soft rounded corners.
Heart
Symbolic and sentimental.
Radiant
Modern with strong sparkle.
How to Choose a Gemstone
| Factor | What to Consider |
|---|---|
| Colour | Look at hue, tone and saturation. Rich, balanced colour is usually more desirable. |
| Clarity | Some gemstones naturally have inclusions, while others are valued for cleaner appearance. |
| Cut | A good cut improves beauty, symmetry and light performance. |
| Durability | Choose harder gemstones for everyday wear and softer gemstones for occasional jewellery. |
| Meaning | Many people choose gemstones based on birth month, symbolism or personal connection. |
How to Care for Gemstone Jewellery
Gemstones vary in hardness, sensitivity and care requirements. Always clean jewellery gently and avoid harsh chemicals.
Clean Gently
Use mild soap, warm water and a soft cloth unless advised otherwise.
Avoid Chemicals
Perfume, chlorine and cleaning products can affect certain gemstones.
Store Separately
Keep jewellery in soft pouches to prevent scratching.
Check Settings
Regularly inspect claws and settings, especially for rings worn daily.
Gemstone Guide FAQs
What is the most durable gemstone?
Diamond is the hardest gemstone, ranking 10 on the Mohs scale. Ruby and sapphire are also very durable, ranking 9.
What are the four precious gemstones?
The traditional precious gemstones are diamond, ruby, sapphire and emerald.
Are semi-precious gemstones less valuable?
Not always. Some semi-precious gemstones can be rare, beautiful and valuable depending on quality, origin and demand.
Which gemstones are best for everyday rings?
Diamonds, sapphires and rubies are among the best choices for everyday rings because of their durability.
Can Pear Jewels create custom gemstone jewellery?
Yes. Pear Jewels can create custom jewellery designs on request, including gemstone-inspired pieces and bespoke fine jewellery.
Related Jewellery Guides
Explore more Pear Jewels education guides to learn about diamonds, ring styles, jewellery care and choosing meaningful pieces.
Inspired by a Gemstone?
Pear Jewels specialises in beautifully crafted fine jewellery and custom design. If you have a gemstone idea in mind, our team can help create a meaningful piece tailored to your style.
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