When jewellery designers, gemstone traders, and fine jewellery brands research lab grown emerald sourcing, two questions dominate: how is it made, and which cut should I choose? Both are important — because the manufacturing process directly affects stone quality, and the cut you choose determines how that quality is expressed in the finished piece.
This guide covers the hydrothermal lab grown emerald manufacturing process from start to finish, compares it with flux growth, and provides a detailed breakdown of all ten standard lab grown emerald cuts — emerald, cushion, heart, Asscher, marquise, oval, pear, princess, round, and trillion — so you can specify with confidence for every application.
How Hydrothermal Lab Grown Emerald Is Made
The hydrothermal process grows lab grown emerald crystals in a sealed, high-pressure autoclave vessel at temperatures between 400°C and 600°C and pressures exceeding 1,000 bar. A temperature gradient drives dissolved mineral nutrients — beryllium, aluminium, silicate, and chromium — upward from the dissolving zone to the growth zone, where they crystallise layer by layer onto seed plates over four to twelve weeks.
This slow, controlled growth is what gives hydrothermal lab grown emeralds their exceptional optical depth, natural-looking inclusions, and rich colour saturation. It closely mimics the geological process that forms natural emeralds — and the results show in the stone. Hydrothermal synthetic emeralds are the preferred specification for fine jewellery production worldwide.
Hydrothermal vs Flux: Why It Matters
Flux-grown lab-created emeralds are produced at higher temperatures in a molten chemical flux. They can achieve excellent clarity but typically show less colour saturation and may contain angular flux inclusions that appear artificial under magnification. Hydrothermal lab grown emeralds deliver superior colour depth, natural-looking inclusions, and better optical performance — making them the choice for any jewellery application where the stone is the centrepiece.
The Ten Lab Grown Emerald Cuts: Which Is Right for You?
DGK Emerald produces all ten standard lab grown emerald cuts in calibrated sizes for production orders. Here is a detailed guide to each shape and its ideal jewellery application.
Emerald Cut Lab Grown Emerald
The emerald cut is the defining shape of this gemstone family. Its long rectangular table with stepped parallel facets creates the famous hall-of-mirrors optical effect — an almost infinite depth of vivid green that no other cut replicates. The cropped corners reduce the risk of chipping and make the emerald cut lab grown emerald ideal for bezel and four-prong settings. Because the open step-cut table is unforgiving of inclusions, eye-clean and VVS hydrothermal lab grown emeralds are typically specified for this cut. Best for: solitaire rings, statement pendants, high-end jewellery collections.
Cushion Cut Lab Grown Emerald
The cushion cut — square or rectangular with rounded corners and a brilliant or mixed facet pattern — is one of the most commercially popular shapes for lab grown emerald production. Its softer silhouette is warm and approachable, and the brilliant faceting delivers excellent light return and sparkle alongside rich green colour. Cushion cut lab grown emeralds are highly versatile — flattering in yellow gold, white gold, and platinum, well-suited to halo settings, and ideal for matched parcel earrings and pendants. Best for: engagement rings, pendant sets, halo pieces, matched earrings.
Heart Cut Lab Grown Emerald
The heart cut is a precisely symmetrical brilliant cut shaped into a recognisable heart form with a cleft at the top and a point at the base. It requires exceptional cutting precision — the two lobes must be perfectly matched and the cleft cleanly defined. Heart cut lab grown emeralds are popular for pendants and earrings rather than rings, where the silhouette is displayed flat and the shape can be fully appreciated. Best for: romantic pendants, earrings, anniversary and Valentine's gifts.
Asscher Cut Lab Grown Emerald
The Asscher cut is a square step-cut emerald — essentially a square emerald cut with a higher crown and deeper pavilion that creates a distinctive concentric square optical effect when viewed from above. Originally developed by the Asscher Diamond Company of Amsterdam in the early twentieth century, the Asscher cut has a strong art deco following and suits vintage-inspired jewellery lines exceptionally well. Asscher cut lab grown emeralds look particularly striking in yellow gold and mixed metal settings. Best for: art deco and vintage jewellery, cocktail rings, statement earrings.
Marquise Cut Lab Grown Emerald
The marquise cut is an elongated brilliant cut with pointed ends — sometimes called "navette" (little boat) due to its shape. It maximises the visual size of a given carat weight, making the stone appear larger than a round or cushion of the same weight. The elongated profile is highly flattering on the finger, visually lengthening and slimming the appearance. Marquise cut lab grown emeralds create dramatic, eye-catching pieces and work beautifully as shoulder stones flanking a central diamond. Best for: east-west and north-south rings, dramatic earrings, shoulder stones, statement pendants.
Oval Cut Lab Grown Emerald
The oval cut is a brilliant-cut stone with an elongated elliptical outline — and it is one of the most popular shapes for lab grown emerald wholesale production orders. Its elongated brilliant faceting delivers excellent colour display and light return, and its versatile shape works beautifully in virtually every jewellery setting. Oval cut lab grown emeralds are ideal for matched parcel production due to efficient yield from rough crystal material, and their elongated profile is flattering in ring settings of all styles. Best for: solitaire rings, matched production parcels, bracelets, pendants, earrings.
Pear Cut Lab Grown Emerald
The pear cut — also known as teardrop — combines a rounded brilliant base with a tapered point, delivering an elegant, feminine silhouette. It has the visual length of a marquise with the approachable softness of an oval. Pear cut lab grown emeralds are classically used as pendant focal stones, where the teardrop shape hangs beautifully in motion, and as shoulder stones in three-stone ring settings. They also work strikingly as drop earrings in matched pairs. Best for: pendants, drop earrings, three-stone rings, asymmetric designs.
Princess Cut Lab Grown Emerald
The princess cut is a square brilliant cut — modern, clean, and geometric. Its brilliant faceting delivers maximum sparkle and light return in a square outline that photographs beautifully and suits contemporary jewellery aesthetics. Princess cut lab grown emeralds work well in channel settings — where their square profile creates perfect alignment in bracelets and rings — as well as in bezel settings for a sleek, minimalist aesthetic. Best for: modern engagement rings, channel-set bracelets, contemporary jewellery lines, stacking rings.
Round Cut Lab Grown Emerald
The round cut — or round brilliant — is the most universally versatile shape in gemstone cutting. Its 58 facets are optimised to maximise brilliance and light return, making it an excellent choice for any piece where sparkle is as important as colour. Round cut lab grown emeralds are the standard specification for melee and pavé applications, available from 1.5mm upward in large calibrated parcels. They are also popular as solitaire focal stones in ring settings that prioritise brilliance over the classic step-cut depth of colour. Best for: pavé settings, channel settings, mixed stone pieces, solitaire rings, high-volume production.
Trillion Cut Lab Grown Emerald
The trillion cut — triangular with either straight or curved sides and brilliant faceting — is a bold, architectural shape that commands attention in any setting. Its wide triangular outline maximises visual spread per carat weight and delivers exceptional brilliance from the multiple triangular facets. Trillion cut lab grown emeralds are most commonly used as shoulder stones flanking a larger central stone in a three-stone ring setting, but also make striking focal stones in statement pendants and cocktail rings. Best for: three-stone ring shoulders, statement cocktail rings, architectural pendants, modern jewellery collections.
Caring for Your Lab Grown Emerald Jewellery
Regardless of cut shape, hydrothermal lab grown emeralds share the same care requirements. Clean with warm water, mild soap, and a soft brush. Avoid ultrasonic cleaners for included stones. Store separately from harder gemstones. Avoid harsh chemicals and prolonged heat exposure. With basic care, any lab grown emerald — whether an oval cut, cushion cut, heart cut, or trillion cut — retains its colour and brilliance indefinitely.
Frequently Asked Questions
Q1: Which lab grown emerald cut is most popular for engagement rings?
The emerald cut, cushion cut, and oval cut are the three most popular choices for lab grown emerald engagement rings. The emerald cut delivers classic sophistication, the cushion cut offers romantic softness, and the oval cut provides a modern, elongating profile.
Q2: Which cut maximises the visual size of a lab grown emerald?
The marquise cut and oval cut maximise visual size for a given carat weight due to their elongated profiles. The trillion cut also delivers excellent spread per carat due to its wide triangular outline.
Q3: Which lab grown emerald cut is best for channel settings?
The princess cut and emerald cut are ideal for channel settings because their straight edges align cleanly. Round cut stones also work well in channel settings, particularly for bracelets and eternity bands.
Q4: Is the heart cut lab grown emerald more expensive than other cuts?
Yes, the heart cut carries a modest premium due to the cutting precision required for perfect symmetry between the two lobes. The trillion cut also carries a small premium for similar reasons.
Q5: What is the most versatile cut for matched parcel production?
The oval cut and round cut are the most commonly specified for matched production parcels due to efficient rough yield, consistent cutting, and high demand across jewellery applications worldwide.
Q6: Can all ten cuts be produced in the same colour and clarity specification?
Yes. DGK Emerald can produce matched colour and clarity specifications across all ten lab grown emerald cuts — emerald, cushion, heart, Asscher, marquise, oval, pear, princess, round, and trillion — for production orders. Contact us with your requirements.
Q7: Do you supply trillion and heart cut lab grown emeralds in small sizes?
Yes. Trillion cut lab grown emeralds are available from approximately 4mm and heart cut from approximately 4mm upward. Below these sizes, the shape definition becomes difficult to maintain. Contact DGK Emerald to discuss minimum sizes for any specific cut shape.
