Diamonds Done Differently

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The Emerald Sourcing & Design Guide

Green oval emerald ring on hand by MOHSTEN

Few gemstones command attention quite like the emerald. With an unmistakable, glowing green saturation that seems to radiate from within, a custom emerald engagement ring is the ultimate statement of timeless luxury and contemporary architectural edge.

At MOHSTEN, we approach emeralds with a dedicated eye for structural balance. Because natural emeralds possess unique physical characteristics, creating a piece that stands the test of time requires expert stone selection and intentional design. We source loose, exceptional emeralds from an elite global network to match your exact color preference, layout, and budget.

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Understanding the Emerald: Colour, Depth, and Origin

Emeralds belong to the beryl mineral family, achieving their rich green hues from trace amounts of chromium and vanadium. When sourcing a custom emerald, we guide you through the key elements that dictate the stone's beauty and value:

1. Saturation and Tone

Unlike diamonds, which are judged on a lack of color, emeralds are all about the depth of their green. The most highly coveted stones feature a vibrant, pure green hue with intense saturation that doesn't look overly dark or cloudy.

2. The Jardin (Natural Inclusions)

Flawless emeralds do not exist in nature. Almost all natural emeralds contain microscopic internal inclusions, beautifully referred to in the jewelry world as the jardin (French for "garden"). These wispy, vine-like characteristics are the birthmarks of the stone, ensuring that your emerald is entirely unique and non-replicable.

3. Global Origins

While we source emeralds globally, stones from premium origins like Colombia are legendary for their warm, pure green glow. We also source exceptional stones from Zambia, which often display a slightly cooler, bluish-green undertone and incredible structural clarity.

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Expert Advice: Structural Design & Emerald Durability

Are emeralds durable enough for an engagement ring?

This is the most crucial question to address when designing an emerald piece. Emeralds rate a 7.5 to 8 on the Mohs Hardness Scale, meaning they are highly resistant to scratching. However, because of their natural jardin (internal inclusions), they are more brittle than sapphires or diamonds and can be prone to chipping if subjected to a hard impact.

At MOHSTEN, we counteract this by utilizing protective, expert structural engineering:

  • Strategic Prong Placement: We place our solid gold claws precisely over the corners of the stone to shield the most vulnerable areas.
  • Custom Bezel Settings: For clients with active lifestyles, framing the emerald in a sleek, modern collar of high-polish gold offers ultimate edge-to-edge protection.
  • Substantial Band Profiles: We scale the weight and width of the band to absorb everyday wear and tear, ensuring the setting remains completely secure.
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MOHSTEN Designer's Note: Pairing Metals with Emeralds


The rich, organic green of an emerald pairs spectacularly with solid 18ct yellow gold, which instantly amplifies the stone’s warmth. To create a striking, high-contrast look, we love designing emerald trilogies flanked by two icy-white, brilliant-cut diamond side stones set in architectural white gold claws.

Frequently Asked Questions

What is the standard clarity treatment for emeralds?

Due to their natural internal fractures, roughly 99% of emeralds undergo a traditional, industry-standard clarity enhancement using colourless oils or resins. This fills the microscopic surface-reaching fissures, improving the stone's transparency and structural stability. This treatment requires gentle care—emerald rings should never be placed in an ultrasonic cleaner or exposed to harsh household chemicals.

What cuts and shapes suit an emerald best?

The classic emerald cut (an elongated step-cut with cropped corners) was literally invented for this gemstone. Its wide, flat facets showcase the liquid-like colour depth perfectly while protecting the stone's corners. For a softer, more romantic silhouette, a custom oval cut or an elongated cushion cut delivers a beautiful, contemporary layout.

How do I maintain and clean my emerald ring?

Because of the traditional oil treatments, emeralds require slightly different care than diamonds. Clean your ring at home using lukewarm water, a very mild soap, and a soft-bristled toothbrush. Every MOHSTEN bespoke piece includes our lifetime aftercare plan, which includes professional, safe cleaning and annual claw inspections in our private suites.

Jewellery Studio with jewellery on display.

Discover the Magic of Emeralds

Ready to view loose, ethically curated emeralds in person? Whether you wish to visit our private suites in Auckland or Hamilton, or collaborate with us virtually, let's map out your dream bespoke design.