What are Lab Grown Diamonds

Lab grown diamonds have transformed the jewellery industry, offering a brilliant alternative that's chemically, physically, and optically identical to mined diamonds. If you've been curious about what lab grown diamonds actually are, how they're made, and whether they're worth buying — this guide covers everything you need to know.

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What Are Lab Grown Diamonds?

Lab grown diamonds — also called lab created diamonds, cultured diamonds, or engineered diamonds — are real diamonds produced in controlled laboratory environments. They are not simulants like cubic zirconia or moissanite. They have the exact same carbon crystal structure, hardness (10 on Mohs scale), refractive index, and brilliance as diamonds mined from the earth.

The only difference is their origin: one forms over billions of years deep underground, while the other is created in weeks using advanced technology that replicates the same natural conditions.

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How Are Lab Grown Diamonds Made?

There are two primary methods used to create lab grown diamonds:

1. HPHT (High Pressure High Temperature)

This method mimics the natural conditions under which diamonds form in the earth's mantle. A small diamond seed is placed in a chamber with carbon and subjected to extreme pressure (around 1.5 million pounds per square inch) and temperatures exceeding 1,500°C. The carbon melts and crystallises around the seed, forming a rough diamond over several weeks.

2. CVD (Chemical Vapour Deposition)

In CVD, a thin diamond seed is placed in a sealed chamber filled with carbon-rich gas (usually methane). The gas is heated to around 800°C, breaking down the carbon molecules which then deposit layer by layer onto the seed, growing a diamond crystal. CVD diamonds tend to have higher purity and are the preferred method for jewellery-grade stones.

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Are Lab Grown Diamonds Real Diamonds?

Yes — unequivocally. Lab grown diamonds are certified as real diamonds by the world's leading gemological laboratories including IGI (International Gemological Institute), SGL (Surat Gem Lab), and GIA (Gemological Institute of America). They receive the same grading on the 4Cs — Cut, Colour, Clarity, and Carat — as mined diamonds.

Even expert gemologists cannot distinguish between a lab grown diamond and a mined diamond without specialised equipment. The Federal Trade Commission (FTC) in the US officially recognises lab grown diamonds as real diamonds.

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Lab Grown Diamonds vs Mined Diamonds: Key Differences

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Why Are Lab Grown Diamonds More Affordable?

Lab grown diamonds cost 40–70% less than mined diamonds — not because they're inferior, but because the supply chain is shorter and more efficient. There's no mining, no land displacement, and no complex multi-country logistics. The savings are passed directly to you.

This means you can get a larger, higher-quality diamond for the same budget. A 1-carat solitaire ring that would cost ₹3–4 lakh in a mined diamond costs ₹30,000–80,000 in lab grown — same sparkle, same certification, dramatically different price.

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Are Lab Grown Diamonds Sustainable?

Yes. Lab grown diamonds have a significantly lower environmental footprint compared to mined diamonds:

• No land disruption — Diamond mining displaces thousands of tonnes of earth per carat
• Lower carbon emissions — Modern labs use renewable energy sources
• No water pollution — Mining operations can contaminate local water systems
• Conflict-free guarantee — No association with conflict or unethical labour practices

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Lab Grown Diamond Certification in India

In India, the most common certifications for lab grown diamonds are:

• IGI (International Gemological Institute) — The global gold standard, headquartered in Antwerp with labs worldwide including Mumbai
• SGL (Surat Gem Lab) — India's leading domestic diamond certification lab
• GIA (Gemological Institute of America) — The most recognised name globally, now certifies lab grown diamonds

At Blu Diamonds, every piece above 0.30ct comes with IGI or SGL certification, ensuring complete transparency on cut, colour, clarity, and carat weight.

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Who Should Buy Lab Grown Diamonds?

Lab grown diamonds are ideal for anyone who wants:

• A bigger, better diamond within their budget
• An ethical, sustainable choice without compromising on beauty
• Certified quality with the same grading as mined diamonds
• The flexibility to own multiple pieces — rings, earrings, pendants, bracelets
• A modern approach to luxury that aligns with conscious values

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Shop Lab Grown Diamond Jewellery at Blu Diamonds

With over 700 designs and five decades of diamond heritage, Blu Diamonds offers India's finest collection of lab grown diamond jewellery. Browse our collections:

• Lab Grown Diamond Rings
• Lab Grown Diamond Earrings
• Lab Grown Diamond Pendants
• Lab Grown Diamond Bracelets

Every piece is crafted in 14kt gold, certified by IGI or SGL, and backed by our lifetime exchange and buyback guarantee.