How to Choose an Emerald: Natural Emerald & Nano Emerald Stone

When choosing emerald jewellery, the most important factor is colour — a deep, vivid green is the most prized. First decide between a natural emerald (a genuine mined gemstone) and a Nano Emerald Stone (an affordable lab-created simulant with bright, consistent colour), then consider clarity, cut, and setting. Here's how to choose with confidence.

Natural Emerald vs Nano Emerald Stone

At Irosk we offer both, and we always describe each piece accurately so you know exactly what you're getting:

• Natural Emerald: a genuine emerald (the green variety of beryl), formed in the earth over millions of years. Prized for its natural origin, it typically carries small inclusions and a higher price — our premium option.
• Nano Emerald Stone: a lab-created simulant — a nano-crystal stone engineered to give emerald's vivid green at a much more accessible price. It isn't mined beryl; it's a man-made stone designed to capture the look of emerald with bright, even colour. A budget-friendly, beautiful alternative.

Both are set in bright 925 sterling silver. The choice comes down to budget and whether you want a genuine mined gem or the affordable simulant look.

Judging Natural Emerald Quality: The Four Cs

For a natural emerald, gemologists look at the "Four Cs" — colour, clarity, cut, and carat weight — with colour usually the most important:

1. Colour: the most desirable emeralds show a deep, vivid green, sometimes with a slightly bluish tone.
2. Clarity: natural emeralds usually have inclusions (tiny internal marks, traditionally called "jardin"). Moderate inclusions are normal and add character; avoid large fractures that could weaken the stone.
3. Cut: a well-cut emerald maximises colour and minimises the look of inclusions.
4. Carat weight: larger natural emeralds are rarer, but colour and clarity usually matter more than size alone.

Assessing Colour in Detail

Colour comes down to hue, tone, and saturation:

• Hue: the basic colour — green, bluish-green, or yellowish-green.
• Tone: how light or dark; a medium to medium-dark tone is often most sought-after.
• Saturation: the intensity of colour — more vivid saturation is generally more desirable.

A Nano Emerald Stone is engineered for especially vivid, consistent colour, while a natural emerald may show subtle natural variation that many people love.

Where Natural Emeralds Come From

For natural emeralds, origin can play a role:

• Colombia: renowned for vibrant, pure green hues.
• Zambia: known for deep green stones with bluish undertones.
• Brazil: produces a wide range of emerald colours, often lighter in tone.

If origin matters to you, ask for certification stating where a natural emerald was mined. (Origin doesn't apply to a Nano Emerald Stone, which is lab-created.)

Cut & Shape

Emeralds come in many shapes — round, oval, pear — but the emerald cut is the classic favourite:

• Emerald cut: shows colour beautifully and helps minimise the look of inclusions.
• Brilliant cuts (round, cushion): offer more sparkle but can reveal more inclusions.

Best Settings for Emerald Jewellery

Whichever stone you choose, the right setting protects it:

• Prong settings: classic for rings — look for sturdy prongs that protect the corners.
• Bezel settings: more metal around the stone for added security, great for everyday wear.
• Halo settings: a halo of smaller accent stones surrounds the emerald and highlights its vivid green.

Caring for Emerald Jewellery

To keep emerald jewellery looking its best: clean gently with warm, soapy water and a soft cloth, avoid harsh chemicals and ultrasonic cleaners, and avoid sudden temperature changes. For full advice, see our emerald care guide.

FAQs About Choosing an Emerald

What's the difference between a natural emerald and a Nano Emerald Stone?

A natural emerald is a genuine mined gemstone (the green variety of beryl). A Nano Emerald Stone is a lab-created simulant — a man-made stone that captures emerald's vivid green at a more accessible price. It isn't mined beryl, and we always say which is which.

What's the most important factor when choosing an emerald?

Colour. A deep, vivid green is the most prized, ahead of clarity, cut, and size.

Why do natural emeralds have inclusions?

Natural emeralds form in the earth and usually contain small natural inclusions ("jardin"). Moderate inclusions are normal and part of a natural stone's character.

Explore our emerald jewellery collection — both Natural Emerald and Nano Emerald Stone pieces — or learn what emerald means as the May birthstone.

About Irosk Australia

Irosk is an Australian jewellery brand specialising in handcrafted 925 sterling silver birthstone and gemstone jewellery. Founded by Ish and Lovneet in 2021 and based in Brisbane, Irosk creates timeless, meaningful pieces designed for gifting and everyday wear — each one crafted with care and accurately described so you always know exactly what you're getting. Your stone. Your story.