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Explore Mount Tisé's curated selection of marquise-cut lab-grown diamonds, showcasing the art of cutting that exudes infinite elegance and unique charm. This elongated cut, with its sharp points and graceful curves, captures every ray of light, creating a distinctive visual effect. Marquise-cut diamonds not only enhance the wearer's noble temperament but also add a touch of extraordinary allure to any occasion. Choose our marquise-cut lab-grown diamonds to make every moment shine with unparalleled brilliance.

Marquise Cut Lab Grown Diamonds

​EXPLORE DIAMONDS

Choose the ring setting

After selecting your desired loose diamond, the next step is to choose the perfect setting for your precious gemstone. Our diverse range of ring settings, from classic elegance to modern chic, is designed to enhance the brilliance of your main diamond. Discover an array of breathtaking designs that will make your diamond shine even more radiantly in its exclusive setting.

Design your own ring

It's not just about choosing, it's about creating—Mount Tisé offers limitless possibilities for custom-made diamond rings. Whether you bring your own design or let our designers craft a unique ring tailored for you, Mount Tisé can transform your unique vision into an extraordinary custom diamond ring, beautifully showcasing your love story in dazzling jewellery.

Popular Marquise Cut Diamond Ring Styles

All You Need to Know About

Marquise Cut Diamonds

About Marquise Cut Ratio

The length-to-width ratio of marquise diamonds determines their appearance and proportions. A ratio of 1.75 offers a shorter and wider look, while a ratio of 1.95 creates a more balanced length-to-width feel, and a ratio of 2.15 presents a more elongated and elegant shape. Unlike traditional diamond cuts, marquise diamonds do not have an official cut grade standard. Therefore, when choosing, you should consider personal preferences and overall aesthetics. Below is a reference chart for the cut grades of marquise diamonds to help you select the most suitable diamond for your needs.

1.75

1.95

2.15

Very Thin - Slightly Thick

52 or 64-65

Very Good

Very Thin - Slightly Thick

53-63

Excellent

Girdle

Table %

Good

Fair

Poor

Depth %

58-62

56-57.9 or

62.1-66

53-55.9 or

66.1-71

50-52.9 or

71.1-74

<50 or >74

Length-to-Width Ratio

1.85-2.00

1.75-1.84 or 2.01-2.15

1.65-1.74 or 2.16-2.30

1.55-1.64 or 2.31-2.45

>1.55 or < 2.45

51 or 66-68

50 or 69-70

<50 or >70

Very Thin - Thick

Very Thin - Very Thick

Extremely Thin - Extremely Thick

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Marquise Cut Diamond Colour

The colour grading of diamonds ranges from D (completely colourless, the highest grade) to Z (light yellow). Diamonds graded D to F are considered colourless, while those graded G to J are nearly colourless, with the colour becoming increasingly noticeable as you move down the scale. Generally, the closer a diamond is to being colourless, the more valuable it is, though certain colour grades, like light yellow, can have their own unique appeal.

 

To assist you in selecting the right diamond, we have provided a reference chart below for marquise cut diamond colour grades to help you choose the appropriate diamond.

D-F

Very Good

D-F

D-G

Excellent

1.00-2.00ct

<0.50ct

Good

0.51-1.00ct

D-F

G

H-I

>2.00ct

D-F

D-F

G

J

G-H

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Marquise Cut Diamond Clarity

Clarity refers to a diamond's degree of internal and surface imperfections (known as inclusions and blemishes). Clarity grades range from Flawless (FL/IF) to Included (I1-I3). Diamonds with higher clarity grades have fewer imperfections, making them rarer and more expensive, while diamonds with lower clarity grades have more noticeable flaws, but can still display beautiful brilliance in certain cases.

 

To assist you in selecting the right diamond, we have provided a reference chart below for marquise cut diamond clarity grades to help you choose the appropriate diamond.

VS1-VS2

Very Good

FL-VVS2

FL-VS2

Excellent

1.00-2.00ct

<0.50ct

Good

0.51-1.00ct

FL-VS1

VS2-SI1

SI2

>2.00ct

FL-VVS2

VS1-VS2

SI1

SI2

SI1-SI2

Diamond quality certification

Mount Tisé diamonds come with a diamond certification, particularly from the International Gemological Institute (IGI), providing authoritative quality assurance. This certificate details the 4Cs characteristics of your lab-grown diamond - cut, clarity, colour, and carat weight. It not only verifies the diamond's authenticity and value but also ensures that you are purchasing an ethically produced and environmentally friendly gem. With this certification, you can buy with confidence, enjoying a transparent and reliable shopping experience.

Other Diamonds

Shop Diamonds by Shape

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Lab-grown Diamonds

Crafted with advanced technology, Mount Tisé's diamonds exhibit the same brilliance and beauty as natural diamonds. These diamonds are not only more affordable but also embody a commitment to environmental and social responsibility, making them a perfect blend of fashion and sustainability.

Natural Diamonds

Originating from the depths of the Earth and formed over billions of years, these diamonds are not only rare and precious but also imbued with unique stories and the mysteries of nature. Each diamond adds timeless brilliance and pure elegance to your special moments.

Diamonds from Hair

Transform the hair of your loved ones into a unique gemstone. These highly personalised diamonds are not only jewellery masterpieces but also everlasting tributes to love and memory, preserving intimate connections and cherished moments within a sparkling diamond.

Shop Diamonds by Origin

Make a Reservation

We invite you to explore the world of Mount Tisé. Begin your exquisite jewellery experience today! Whether you prefer to visit us in-store for a personal fitting or seek an online consultation, our expert jewellery specialists are here to answer all your questions, offer professional advice, and recommend the perfect pieces tailored to your story and taste. Book now and start crafting your unique jewellery journey.

FAQ

About Marquise Cut Lab Grown Diamonds

Marquise cut diamonds, with their unique elegance and elongated shape, are well-suited for various ring designs, particularly vintage, modern, and luxurious styles. They stand out in solitaire settings, exuding a regal and distinctive look, and add a touch of glamour in three-stone or side-stone settings. Additionally, marquise diamonds are ideal for rings with detailed embellishments, such as diamond-encrusted bands, which can further accentuate their shape and reduce the visibility of the bow-tie effect, a central shadow phenomenon caused by uneven cutting. Choosing the right design can maximise the unique charm and brilliance of marquise-cut diamonds.

What types of ring designs are suitable for marquise cut diamonds?

To judge the cut quality of marquise lab-grown diamonds, you should first focus on their symmetry and proportions. A well-cut marquise diamond should exhibit a uniform length-to-width ratio, with the ends pointed and the middle broader, creating a distinctive boat-like shape. Additionally, assessing the diamond's brightness and fire is crucial; a quality cut maximises light capture, enhancing the diamond's brilliance and sparkle. Pay attention to the bow-tie effect—a dark area resembling a black bow-tie caused by improper cutting. Excellent craftsmanship minimises the bow-tie effect, ensuring the diamond's brightness and shine. Finally, ensure the diamond's polish is flawless, as this directly affects its overall beauty and reflective properties. By examining these details, you can effectively evaluate the cut quality of marquise lab-grown diamonds.

How to judge the cut quality of marquise lab-grown diamonds?

To authenticate lab-grown diamonds, you should first rely on professional certifications such as those from GIA (Gemological Institute of America) or IGI (International Gemological Institute). Lab created diamonds share the same chemical and physical properties as natural diamonds, but specialised instruments like spectrometers can detect subtle differences by examining internal structure patterns or using ultraviolet light. Additionally, lab-grown diamonds often have specific marks, such as laser inscriptions, to confirm their identity. Choosing reputable suppliers and requesting certification reports during purchase are crucial steps in verifying the authenticity of lab-grown diamonds.

How to Authenticate Lab-Grown Diamonds?

Lab-grown diamonds often surpass natural diamonds in quality. This is because the production process in a laboratory under precisely controlled conditions can significantly reduce the inclusion of impurities, ensuring the diamonds' purity and colour consistency. Unlike natural diamonds that take billions of years to form deep within the Earth and may contain natural flaws, lab-grown diamonds benefit from this controlled environment, often resulting in higher clarity and better cut quality. Consequently, lab created diamonds can offer superior options in terms of visual appeal and technical characteristics compared to traditional natural diamonds.

Can lab-grown diamonds compare in quality to natural diamonds?

Lab-grown diamonds are synthetic diamonds created under laboratory conditions. This process mimics the natural conditions under which diamonds are formed within the Earth and is primarily achieved using High-Temperature High-Pressure (HTHP) or Chemical Vapor Deposition (CVD) techniques. 

 

HTHP: In this method, carbon elements are subjected to high temperatures and pressures that simulate the Earth's crust conditions, transforming the carbon into diamonds.

 

CVD: This method involves decomposing carbon source gases in a gas mixture and depositing the carbon onto a specific substrate to grow the diamond.

 

Both techniques produce lab diamonds with the same structure and optical properties as natural diamonds, offering high-quality and affordable options.

How are lab-grown diamonds made?

Lab-grown diamonds, also known as synthetic or lab-created diamonds, are gemstones scientifically synthesised under controlled conditions to have the same chemical structure and physical properties as natural diamonds. Unlike natural diamonds, which are formed over billions of years deep within the Earth, lab-grown diamonds are produced much faster and more environmentally friendly. The production process is also more cost-effective and ensures the diamonds are conflict-free. While visually and structurally indistinguishable from natural diamonds, lab diamonds offer a more sustainable and economical alternative.

What are lab-grown diamonds, and how are they different from natural diamonds?
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