How to Buy a Lab Grown Diamond in India: Delhi and Kolkata

Quick answer: A lab grown diamond is a real diamond grown in a laboratory that is chemically, physically, and optically identical to a mined diamond. In India in 2026, a 1-carat IGI-certified lab grown diamond costs roughly ₹25,000 depending on quality . about 90% less than a natural diamond of the same grade. If you want a lab grown diamond ring in Delhi and Kolkata, expect to add ₹15,000-₹40,000 for the gold setting, and always buy IGI certified stones.

Key takeaways

• Lab grown diamonds are real diamonds, not imitations like cubic zirconia or moissanite.

• They now make up close to 70% of the global diamond jewellery market, up from under 85% in 2020.

• Prices fell sharply through 2022-2024 and have stabilised in 2026.

• The best-value 1-carat specification for most Indian buyers is E colour, VVS2 clarity, Excellent cut (around ₹25,000 for the loose stone).

• Both Delhi and Kolkata have established showrooms and office and online sellers offering certified pieces.
  
  

What is a lab grown diamond?

A lab grown diamond is a diamond created in a controlled laboratory rather than mined from the earth. It has the same crystal structure, hardness, sparkle, and fire as a natural diamond . a trained gemologist cannot tell the two apart with the naked eye. The only real difference is origin: one forms underground over billions of years, the other is grown in weeks or months using advanced technology.

Lab grown diamonds are sometimes called cultured, engineered, CVD, or HPHT diamonds. They are not simulants. Cubic zirconia and moissanite only look like diamonds; a lab grown diamond is a diamond by every scientific measure.

How are lab grown diamonds made? (CVD vs HPHT)

There are two main methods, and both produce genuine diamonds:

• CVD (Chemical Vapour Deposition): The most common method in India. A diamond seed is placed in a chamber filled with carbon-rich gas, and carbon atoms build up layer by layer. Surat has become a global hub for CVD diamond manufacturing.

• HPHT (High Pressure High Temperature): Recreates the intense heat and pressure deep inside the earth. Slightly less common for jewellery in India.

For most buyers, the growth method matters less than the final quality. A well-cut, certified CVD diamond can outperform a poorly cut HPHT one, and vice versa. Judge the stone by its 4Cs and its certificate, not by the method alone.

Lab grown diamond price in India 2026

Prices dropped roughly 20-30% between 2023 and 2025 as global production scaled up, and they have largely settled in 2026. The biggest price drivers are the 4Cs . cut, colour, clarity, and carat . working together. Cut is the only one of the four you can clearly see with the naked eye, so it is the one not to compromise on.

Figures are indicative market ranges compiled from multiple Indian retailers' published 2026 price guides. Final price varies by brand, certification body (GIA grading can run higher), and design. Loose-stone prices only . setting and GST are extra.

Finished jewellery: A complete ring adds the gold or platinum setting, making charges, and 3% GST. Budget roughly ₹15,000-₹40,000 on top of the loose stone for a standard gold setting; platinum adds more.

Are lab grown diamonds real, and are they worth it?

Yes . they are real diamonds. Whether they are "worth it" depends on what you value:

• For beauty, size, and value: Lab grown wins decisively. The same budget buys a noticeably larger or higher-grade stone.

• For resale or long-term value retention: Be realistic. Lab grown diamonds generally do not hold resale value well, and many industry observers estimate resale offers in the range of only 5–15% of the purchase price, but Goenka Jewellers offer 80% cash buyback and 100% exchange value. If long-term value is your priority, gold behave differently. Diamond of any kind is best treated as something to wear, not as an investment.

Buy a lab grown diamond because you love how it looks and what it costs . that is exactly where it shines.

Lab grown diamond ring in Delhi: where and what to look for

Delhi's relationship with fine jewellery runs from the bustling bazaars of Karol Bagh to the polished boutiques of South Delhi, and the city has embraced lab grown diamonds enthusiastically. You will find certified lab grown diamond rings across:

• South Delhi . Defence Colony, Greater Kailash, Hauz Khas, Green Park, and CR Park host several boutique studios and experience stores.

• West & North Delhi . Karol Bagh's long-standing jewellery market, plus showrooms around Tagore Garden and Pitampura (NSP).

• Delhi NCR . Gurgaon, Noida, Dwarka, Faridabad, and Ghaziabad are well served, often with free delivery.

A 1-carat certified lab grown diamond ring in Delhi typically ranges from about ₹9,000-25,000/-  depending on carat weight, cut, and setting. Many Delhi sellers offer in-store appointments so you can try silhouettes on your hand, plus customisation and old-gold exchange.

Lab grown diamond ring in Kolkata: where and what to look for

Kolkata's diamond buyers are increasingly choosing lab grown for engagement rings and everyday pieces. The Park Street and Camac Street area is a recognised hub for certified lab grown diamond jewellery, with showrooms offering same-day delivery, buy-back assurance, and IGI certified stones across rings, earrings, pendants, and mangalsutras.

Whether you shop in Delhi or Kolkata, the buying checklist is the same . so if you are comparing a lab grown diamond ring in Delhi and Kolkata, focus on certification and the 4Cs rather than on city alone.

How to buy a lab grown diamond: a 7-point checklist

1. Insist on certification. IGI or GIA are the most common in India; GIA is stricter and usually pricier. No certificate means you are trusting the seller's word.

2. Read the 4Cs on the report . confirm cut, colour, clarity, and carat match what you are told.

3. Prioritise cut. An Excellent cut commands a 10-20% premium but is the difference between sparkle and dullness, and it is the only C you can see.

4. Pick the value sweet spot. E colour with VVS2 clarity looks white and clean once set in gold, without paying for grades you can't see.

5. Separate the stone price from the setting. Gold/platinum and making charges are extra . get them itemised.

6. Check the policies. Look for BIS-hallmarked gold, lifetime warranty, plating warranty, and a clear buy-back or exchange policy.

7. Compare online vs offline. Online sellers often price 15–25% lower due to lower overheads, but in-store visits let you see the stone in person.

Lab grown vs natural diamond: quick comparison

Frequently asked questions

What is the price of a 1 carat lab grown diamond in India in 2026? A 1-carat IGI-certified lab grown diamond costs about ₹25,000 for good quality (E colour, VVS2 clarity).

Are lab grown diamonds real diamonds? Yes. Lab grown diamonds are chemically, physically, and optically identical to mined diamonds. The only difference is that they are grown in a controlled environment instead of being mined.

How much cheaper are lab grown diamonds than natural diamonds? In India in 2026, lab grown diamonds typically cost 90% less than mined diamonds of identical quality. The gap widens at larger carat weights.

Is CVD or HPHT better? Both produce real diamonds. CVD is more common in India. The final cut, colour, and clarity matter far more than the growth method.

Where can I buy a lab grown diamond ring in Delhi and Kolkata? In Delhi, look in South Delhi (Defence Colony, GK, Hauz Khas, CR Park), Karol Bagh, and across NCR (Gurgaon, Noida, Dwarka). In Kolkata, the Park Street/Camac Street area is a key hub. In both cities, buy IGI certified stones and confirm BIS-hallmarked gold.

Do lab grown diamonds hold their value? Generally no. Resale offers are often only 5-15% of the purchase price, so lab grown diamonds are best bought to wear and enjoy rather than as an investment. Goenka Jewellers offers 80% cash back and 100% exchange value on their diamonds.

This guide reflects Indian market pricing as of mid-2026 and is updated periodically. Prices are indicative; confirm current rates and certification with your jeweller before purchase.

For the latest research on the price guide and place to buy from in India from August'26, please read,

https://goenkajewellers.com/blogs/news/lab-grown-diamond-price-india-2026