Loose Diamonds

3 Carat SI1 Clarity Lab Grown Diamonds

Are you looking to buy a lab-grown loose diamond or engagement ring? Select from the thousands of certified diamonds in our collection. Lab-grown diamonds are chemically, physically, and optically identical to mined diamonds — available at 50–70% less than the cost of a naturally mined stone.

Carat · 3.00 – 3.49 ct
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Price · $100 – $1,400,000
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Cut grade only applies to Round diamonds.
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3 Carat SI1 Clarity Lab-Grown Diamond

Elevate your style with a 3 carat SI1 clarity lab-grown diamond. Known for its mirror-like step cuts and timeless elegance, this cut radiates sophistication—while the SI1 grade delivers brilliant sparkle with inclusions visible only under magnification.

What Is a Lab-Grown Diamond?

Lab-grown diamonds are real diamonds created in a laboratory setting, using either the High Pressure High Temperature (HPHT) or Chemical Vapor Deposition (CVD) process. They are physically, chemically, and visually the same as mined diamonds—so much so that even expert gemologists require advanced equipment to tell them apart.

Choosing lab-grown means saving 30% to 50% over the price of a natural diamond, all while making an environmentally conscious and ethical decision.

All REVE Diamonds’ lab-grown stones are independently certified, most commonly by IGI or GIA.

If you need assistance selecting your 3 Carat SI1 Clarity Lab-Grown Diamond, contact us today:

New York: +1 (646) 898 2098

Los Angeles: +1 (310) 920 6656

Or chat with us now!

Frequently Asked Questions

What does SI1 clarity mean in a 3 carat lab grown diamond?

SI1 (Slightly Included) clarity indicates the diamond has small internal flaws that are visible under 10x magnification and occasionally with the naked eye. It’s a cost-effective option offering excellent visual appeal.

How much does a 3 carat SI1 clarity lab grown diamond cost?

Prices typically range from $2,500 to $16,000, depending on the diamond’s cut, color, polish, symmetry, and certification. SI1 clarity offers strong value while maintaining beauty.

Is a 3 carat SI1 clarity lab grown diamond better than a mined diamond?

Lab grown diamonds are chemically and optically identical to mined diamonds. A 3ct SI1 clarity lab grown diamond delivers the same brilliance at a significantly lower cost and with reduced environmental impact.

Will an SI1 clarity lab grown diamond look better than a VS or VVS diamond?

To the naked eye, SI1 diamonds can look very similar to VS or VVS stones. While inclusions may be more noticeable under magnification, many buyers find SI1 clarity offers the best value-to-quality ratio.

What size is a 3 carat SI1 lab grown diamond?

A 3 carat diamond typically measures around 9.3 mm in diameter for a round cut or 9.5 mm x 9.5 mm for a square cut like Asscher. Clarity does not affect the dimensions of the stone.

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3 Carat SI1 Clarity Lab-Grown Diamond | Rêve Diamonds