The Xemplare Guide to Buying Coloured Gemstones 

Coloured gemstones have long enchanted jewellery lovers with their unique beauty, depth of character, and radiant individuality. Whether you're drawn to the velvety blues of sapphire, the vivid greens of emerald, or the regal purples of amethyst, selecting the perfect gemstone requires a blend of appreciation, knowledge, and discernment. 

At Xemplare, we believe that understanding what makes a gemstone exceptional enhances not only its value—but your connection to it. Here's what to consider when choosing a coloured stone for your next heirloom-worthy piece. 

1. Colour: The Soul of the Gem 

When it comes to coloured gemstones, colour is everything. But it’s more nuanced than simply “red” or “blue”—true quality lies in a refined balance of hue, tone, and saturation. 

Hue refers to the dominant colour and any secondary tints present. For example, a blue sapphire might lean slightly green or violet. 

Tone describes how light or dark the stone is, from pale pastels to deep, dramatic shades. 

Saturation speaks to intensity—how rich and vivid the colour appears. Exceptional stones have high saturation with little to no greying or browning. 

Look for stones with even colour distribution, free from distracting zoning or patchiness. The most prized gemstones captivate with an uninterrupted flood of vivid, luminous colour. 

2. Clarity: Beauty with Character 

Unlike diamonds, coloured gemstones are often expected to have inclusions—tiny natural features formed within the earth. These inclusions can add uniqueness and even become part of a gem’s charm. 

Emeralds, for example, are known for their inclusions (often called “jardin,” or garden), and are judged more gently than sapphires or rubies. 

Still, avoid stones with excessive inclusions that cloud the gem or interrupt the light within it. 

Ultimately, clarity should complement the stone’s beauty, not detract from it. 

3. Cut: The Art of Illumination 

A gemstone’s cut determines how it plays with light—how it sparkles, glows, or glimmers. 

Seek out well-proportioned cuts that maximise brilliance and avoid the dreaded "window" effect (a pale, see-through centre). 

Traditional cuts like oval, cushion, and emerald shapes are often used for coloured stones, but modern options like the princess cut can also enhance depth and vibrancy, particularly in darker stones. 

The right cut elevates the gem’s natural allure—and ensures your jewellery dazzles from every angle. 

4. Carat Weight: Quality over Quantity 

Larger gemstones can be striking, but size alone does not determine value. A smaller stone with exceptional colour and clarity can far outshine a larger one that lacks brilliance. 

Trust your eye—and your heart—when assessing a stone’s visual impact. The most valuable gems are those that combine beauty, rarity, and precision. 

5. Treatments: Enhancements & Transparency 

Many coloured gemstones undergo treatments to improve colour or clarity—such as heat treatment in sapphires or oiling in emeralds. These are widely accepted practices, but transparency is key. 

Always ask: 

What treatments has this stone received? 

Are these enhancements permanent or temporary? 

For peace of mind, significant purchases should be accompanied by documentation from a reputable independent gemological laboratory. 

6. Trust the Source 

Buy from a jeweller who is knowledgeable, transparent, and committed to ethical sourcing. A trusted supplier will: 

Provide clear information on the gem’s origin and treatments 

Offer certified stones from recognised gemmological institutes (such as GIA, GSL, AGL, or SSEF) 

Stand behind the quality and authenticity of every piece 

At Xemplare, we partner with the most respected sources and artisans to ensure your coloured gemstone is not only beautiful—but responsibly acquired and masterfully set. 

7. Choose with Heart 

Above all, let your choice reflect your own style, sentiment, and story. A gemstone should resonate with you—its colour, its presence, its energy. Whether you're marking a milestone, gifting love, or indulging in something truly extraordinary, trust your instincts. 

Because at the end of the day, the finest gemstone is the one that feels like it was always meant to be yours.