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This 39 ct. Tennis Double Layer Lab Diamond Necklace gives the classic tennis necklace a fuller look through two continuous rows of diamonds. Crafted in polished 18K white gold, the 17-inch design creates a layered diamond profile while keeping the overall composition clean and balanced. The double-layer construction increases the diamond presence without adding unnecessary decorative elements, making the necklace distinctive through its scale, structure and continuous arrangement of colourless lab-grown diamonds.
• Custom carat options allow the necklace to be created in different total carat weights, including this 39 ct. design
• White lab-grown diamonds of excellent cut, VS1 or better clarity, colourless D-E-F
• One of IGI, IDT, HRD, SGL, GIA certificates is provided with the complete jewellery piece
• Available customisation in white, yellow, and rose 18K gold
• Diamond cuts may include round, oval, cushion, pear, radiant, emerald, marquise, asscher, princess, heart, and multishape for applicable custom designs
• Complementary express shipping
• Complementary personalisation
• Complementary signature emerald-green gift box
• Natural diamond option available
Signature Design Details
The defining feature of this tennis necklace is its double-layer design, with two diamond rows creating a stronger visual presence than a single-line tennis necklace. The 39 ct. total diamond weight is distributed across the 17-inch composition, while polished 18K white gold keeps the structure visually clean and lets the diamonds remain the main focus. The layered format gives the necklace additional depth while preserving the continuous character of a tennis design.
Looking for something unique? Our jewellery specialists can help you personalise this design or create a completely custom necklace tailored to your vision.
Craftsmanship with Precision and Care
Each Tennis Double Layer Lab Diamond (39 ct.) Necklace (17 in.) 18K White Gold is handcrafted in solid 18K gold and made to order. The lab-grown diamonds are selected for their excellent cut, brilliance, colourless D-E-F colour and VS1 or better clarity. One certification from IGI, IDT, HRD, SGL or GIA is provided with the complete jewellery piece. The necklace can be customised with your preferred total carat weight, metal colour and applicable diamond and setting details while retaining its defining double-layer tennis design. A natural diamond version is also available with GIA-certified natural diamonds where applicable.
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Other jewellery (bracelets, bands, necklaces, earrings) can be certified by IGI, SGL, IDL or HRD.
Carat
- Carat weight has the most influence on diamond value. The weight or size of a diamond is measured in carats (ct.).
- Diamonds of different shapes may appear different sizes for the same carat weight.
- One carat weighs 1/5 of a gram and is divided into 100 points. For example:
0.75 carat = 75 points 1/2 carat = 50 points 1/4 carat = 25 points
- When diamonds are mined, large gems are discovered much less frequently than small ones. This rarity makes large diamonds much more valuable.
- Diamond prices rise exponentially with carat weight. So, a 2-carat diamond of a given quality is always worth more than two 1-carat diamonds of the same quality.
Color
- Diamonds are graded on a scale from colorless to light yellow or light brown. D-F falls within the colorless range, which is considered the rarest and most expensive.
- Fancy colored diamonds are those with hues other than yellow or brown, and they are graded separately.
- The color of diamonds is determined by comparing them to a master set of stones ranging from D (colorless) to Z (most yellow/brown).
- IGI assigns color grades for diamonds in the D-Z range by viewing them through the pavilion in a neutral environment to ensure accuracy.
Clarity
- Clarity evaluates a diamond's freedom from internal and external characteristics that occurred during formation, polishing, or wear.
- Clarity characteristics include inclusions (internal) and blemishes (external).
- Grading the clarity involves observing the number, nature, size, and position of these characteristics.
- IGI grading reports include diagrams showing clarity characteristics, marked in red for internal and green for external features.
- Cut quality significantly affects a diamond's appearance, including its brilliance, dispersion (fire), contrast patterns, and scintillation (sparkle).
- Man-made factors such as planning, proportions, cutting precision, and finishing details determine the diamond's visual properties.
- Diamond faceting has evolved over time, with different shapes and cutting styles available.


























