18K Lab Grown Diamond Rings, IGI Certified

18K gold is 75% pure gold. It is the standard gold purity for engagement rings and occasion fine jewellery in India, prized for its rich, deep colour, particularly in yellow gold. The remaining 25% is an alloy that gives the metal workability while retaining a luxurious appearance.

This collection contains lab grown diamond rings set exclusively in 18K gold across yellow, white, and rose finishes. All diamonds are IGI or GIA certified. Diamond engagement rings for women in 18K gold represent the most-requested combination at Goenka. Part of the wider lab grown diamond rings collection.

Lab grown diamond rings in 18K gold at Goenka cover the full range from solitaires to statement pieces. The 18K standard is what most buyers picture when they think of fine diamond jewellery, and it remains the benchmark for engagement and occasion rings in India.

18K Ring Styles in This Collection

18K Solitaire Rings

Single-stone settings in round brilliant, oval, pear, princess, and cushion cuts. Available from 0.25ct to 5ct. The richer colour of 18K gold, particularly yellow, complements diamond settings well. See the solitaire rings collection.

18K Engagement Rings

The standard gold purity for engagement rings in India. 18K white gold is the most popular metal choice for engagement settings, offering a contemporary look that highlights diamond brilliance. See the dedicated engagement rings collection.

18K Halo and Pave Rings

Halo settings with smaller pave diamonds along the band, set in 18K gold. The richer metal tone provides a strong contrast against the diamonds, enhancing the overall brilliance of the design.

18K Cocktail Rings

Multi-stone and cluster designs in 18K gold. The weight and richness of 18K suits statement pieces designed for occasions. See the cocktail rings collection.

18K Eternity and Wedding Bands

Full and half-eternity bands in 18K gold, designed to complement engagement rings. See the eternity band rings collection.

Why Choose 18K Gold

•     Gold purity: 18K is 75% pure gold, compared to 58.5% for 14K and 37.5% for 9K.

•     Colour: 18K has the richest, deepest gold tone, particularly noticeable in yellow gold.

•     Tradition: 18K is the established standard for engagement rings and occasion jewellery in India.

•     Hypoallergenic properties: Higher gold content generally means fewer alloy metals, which can be preferable for sensitive skin.

•     Trade-off: 18K is softer than 14K and 9K, meaning it scratches more easily with constant daily contact.

For rings worn every single day in demanding conditions, 14K gold offers more durability at a lower price. For occasion pieces and engagement rings, 18K remains the preferred choice.

How to Choose an 18K Diamond Ring

Metal colour. 18K yellow gold has the deepest, warmest tone. 18K white gold is rhodium-plated for a bright, silvery finish that requires occasional replating to maintain. 18K rose gold offers a contemporary pinkish tone.

Engagement ring standard. For an engagement ring, 18K is the conventional choice in India, balancing prestige, appearance, and practical durability for a piece that, while worn daily, receives careful handling.

Maintenance. 18K white gold benefits from occasional rhodium replating, typically every 1 to 2 years depending on wear, to maintain its bright white appearance. 18K yellow and rose gold do not require replating.

Lab Grown vs Natural Diamond Rings in 18K Gold

Lab grown diamonds and natural diamonds differ only in origin and price:

•     Carbon structure: Identical in both. Same hardness of 10 on the Mohs scale, same refractive index, same brilliance.

•     Certification: Both carry IGI or GIA grading certificates with full 4Cs documentation.

•     Price: Lab grown costs 60 to 75% less than a natural diamond of the same cut, colour, and clarity grade.

•     Origin: Lab grown from a CVD or HPHT laboratory. Natural from earth-mined sources.

•     Secondary market: Lab grown has a lower secondary resale market at this time. Natural diamonds have an established resale market. Worth knowing before purchase.

A 1ct Excellent-cut, G colour, VS2 clarity lab grown diamond ring in 18K gold costs approximately Rs.85,000 to Rs.1,10,000 at Goenka. A natural diamond of the same specification in 18K gold starts at Rs.2,20,000 or more. The savings apply across all carat weights in 18K, with the gap widening as carat weight increases.

Price Ranges for 18K Rings

•     Rs.40,000 to Rs.70,000: 0.3ct to 0.6ct, 18K gold. Best for minimal solitaires, daily wear in 18K.

•     Rs.70,000 to Rs.1,30,000: 0.7ct to 1.2ct, 18K gold, Excellent cut. Best for most popular 18K engagement ring range.

•     Rs.1,30,000 to Rs.2,50,000: 1.2ct to 2ct, 18K gold. Best for premium solitaires, halo settings.

•     Above Rs.2,50,000: 2ct and above, 18K gold. Best for statement rings, custom designs.

All purchases include the IGI or GIA diamond certificate and BIS hallmark documentation.

About Goenka Jewellers

Goenka Jewellers has manufactured lab grown diamond jewellery since 2006, with production based in Kolkata. Pieces are sold directly, without third-party retail markup.

Every purchase includes:

•     IGI or GIA certificate with every diamond

•     BIS hallmark certificate with every gold piece

•     100% exchange guarantee on all jewellery

•     Lifetime manufacturing warranty

•     Free shipping across India

•     Physical boutiques in Kolkata and Delhi

•     Custom and made-to-order pieces available